C21 Daim Ntawv Tshaj Lij (46 Duab): Lub Rooj Tsav Xwm Corrugated Rau Lub Laj Kab Thiab Lub Ru Tsev, Qhov Ntev Ntawm Cov Ntawv Galvanized Thiab Qhov Hnyav, Lwm Yam Yam Ntxwv Tshwj X

2024 Tus sau: Beatrice Philips | [email protected]. Kawg hloov kho: 2024-01-18 12:13

Kab lus no yuav tsom mus rau ib qho ntawm ntau yam khoom siv niaj hnub no. Tam sim no, nws tau siv dav thaum ua ob lub ru tsev thiab lub ntsej muag, nrog rau kev tsim kho dav dav. Xav txog txhua yam ntxiv uas koj xav paub txog C21 cov ntawv tshaj lij.

Nqe lus piav qhia

Qhov tseem ceeb ntawm daim ntawv profiled hauv nqe lus nug yog qhov siab ntawm trapezoid (yoj), uas yog 21 hli, uas muab kev muaj peev xwm ua kom muaj zog ntxiv . Ib qho ntxiv, daim ntawv teev cov txiaj ntsig zoo suav nrog tus nqi pheej yig, ua tau zoo, kav ntev thiab muaj txiaj ntsig. Coj mus rau hauv tus account lub ntsiab tsis, galvanized corrugated board yog nquag thiab ua tiav siv hauv kev tsim kho ntawm cov txheej txheem raug rau cua loj.

Kev xyaum mus sij hawm ntev tau ua pov thawj tias cov ntaub ntawv tsim los ntawm cov hlau ntxig yog cov khoom tsim tau zoo thiab siv tau yooj yim. Tam sim no cov vaj huam sib luag tau dav siv feem ntau vim yog lawv muaj ntau yam . Tsis txhob hle lub ntsej muag zoo nkauj ib yam, vim tias lub rooj zaum corrugated zoo li zoo. Vim qhov tseeb tias nws ruaj thiab hnyav, ntau yam kev tsim kho tau nrawm los ntawm nws.

Peb tab tom tham, piv txwv li, hais txog kev tsim kho me me, laj kab, rooj vag thiab, ntawm chav kawm, ru tsev.

Coob leej xav paub qhov sib txawv ntawm C21 thiab C20 cov ntawv qib. Txhawm rau teb lo lus nug no, nws yog qhov tsim nyog yuav tsum xub qhia txog cov yam ntxwv tseem ceeb ntawm cov khoom hauv nqe lus nug.

• Ntau yam xim rau C21 cov ntawv txheeb nrog cov txheej tiv thaiv polymer. Cov vaj huam sib luag yooj yim galvanized (tsis muaj txheej) zoo li tsis ntxim nyiam.
• Tus nqi pheej yig. Yog li, tus nqi rau 1 sq. m pib ntawm 150 rubles.
• Tsis tshua muaj qhov hnyav, vim qhov kev teeb tsa thiab kev thauj mus los ntawm cov ntawv tau yooj yim tshaj plaws. Qhov no tso cai rau koj ua tiav feem ntau ntawm kev ua haujlwm, tsis hais txog lawv qhov nyuaj, los ntawm ob, thiab qee zaum txawm tias ib tus neeg.
• Kev pab lub neej ntev ntawm cov khoom siv. Hauv kev xyaum, cov ntaub ntawv pov thawj khaws nws cov txiaj ntsig zoo txog li 30 xyoo. Qhov kev zoo nkauj tsis yog qhov tseem ceeb dua, txij li cov qauv tswj hwm lawv lub ntsej muag ntev. Nws yog qhov tseem ceeb uas qhov no cuam tshuam rau kev ua haujlwm nyuaj.
• Muaj ntau yam, muab qhov muaj peev xwm nthuav dav siv, nrog rau kev sib xyaw nrog cov khoom sib txawv ua los ntawm hlau, ntoo thiab yas.
• Lub xub ntiag ntawm feem ntau tiv taus rau kev puas tsuaj thiab cov txiaj ntsig ntawm ib puag ncig txhoj puab heev ntawm txheej tiv thaiv ntawm qhov chaw. Qhov no yog hais txog cov ntawv nrog txheej polymer, uas yuav luag tag nrho tiv thaiv kev xeb.
• Ntau yam kev nthuav qhia nthuav tawm hauv khw los ntawm ntau lub tuam txhab tshwj xeeb hauv kev tsim cov ntawv tsev thiab cov khoom tiav.

Txheeb xyuas qhov sib txawv ntawm C21 thiab C20 corrugated board, nws yuav tsum tau sau tseg tias ob qho kev xaiv muaj qhov zoo ib yam. Qhov no hais txog ob qho kev tsim lub ru tsev thiab kev tsim cov phab ntsa.

Ob lub npe tau ua tiav siv tus kheej thiab kev tsim kho vaj tsev . Ob hom khoom siv tau yooj yim galvanized, thiab tseem muaj txheej tiv thaiv ntxiv ntawm cov polymers. Hauv txoj ntsiab cai, cov yam ntxwv tseem ceeb ntawm cov ntawv txheeb tau zoo ib yam. Qhov sib txawv tseem ceeb tshaj plaws nyob ntawm qhov ntev ntawm lub vaj huam sib luag (C21 loj). Qhov no txhais tau tias cov khoom muaj peev xwm tiv taus cov khoom thauj tau zoo tuaj. Tab sis tib lub sijhawm, tus nqi ntawm daim ntawv profiled tseem nce ntxiv.

Lawv ua li cas?

Txog rau hnub tim, cov ntawv tshaj lij tshaj lij tau tsim los ntawm ntau lub tuam txhab ua haujlwm hlau. Qhov no yog vim qhov yooj yim ntawm cov txheej txheem tsim khoom thiab tsis muaj qhov xav tau cov cuab yeej kim. Tab sis nws yog ib qho tseem ceeb uas yuav tau txiav txim siab tias kev tso tawm cov ntaub ntawv no yog tswj hwm los ntawm ntau cov ntaub ntawv raug cai.

• GOST R52246-2004 , raws li cov ntawv galvanized profiled yuav tsum tau ua los ntawm txias-kuav los tiag, coiled hlau (qib 220-350 lossis 01). Ib qho tseem ceeb hauv qhov no yog qhov muaj kev pov hwm tsim nyog.
• GOST 24045-94 , coj mus rau hauv tus account cov cai uas tsim cov ntawv zoo tib yam tau ua tiav.
• GOST R52146-2003 , teeb tsa cov qauv rau kev tsim cov pleev xim C21 los ntawm galvanized galvanized nrog cov nplaim polymer.

Ib qho tseem ceeb yog qhov tsis muaj cua txias-kuav los tiag hlau tsis tshua siv los ua raw khoom rau kev tsim khoom . Qhov no yog vim lub sijhawm ua haujlwm luv ntawm cov khoom, uas tsis muaj kev tiv thaiv kev tiv thaiv corrosion. Raws li txoj cai, cov ntawv zoo li no yuav nyob ntev dua 5 xyoos. Qhov xwm txheej hloov pauv ntau vim yog siv cov txheej zinc lossis tsim cov txheej aluzinc.

Los ntawm txoj kev, kev siv cov thev naus laus zis no tsis cuam tshuam rau tus nqi kawg ntawm kev tsim khoom. Raws li qhov tshwm sim, kev pab lub neej tuaj yeem txuas ntxiv mus rau 25-30 xyoo.

Ntxiv rau txhua yam uas twb tau teev tseg, nws tsim nyog them nyiaj rau kev siv txheej txheej polymer. Polyester, pural, polyurethane lossis plastisol yog siv rau hauv cov txheej nyias nyias ntawm cov nplaim txias kauv hlau. Cov theem tom ntej ntawm kev tsim khoom yog kev kho cua sov ntawm cov khoom siv hauv qhov cub. Hauv txheej txheem ntawm yaj cov polymer, cov yeeb yaj kiab muaj zog tau tsim. Ib qho ntawm nws cov yam ntxwv tseem ceeb yog qhov siab tshaj plaws, vim tias txheej txheej tiv thaiv tsis raug puas tsuaj thaum dov.

Cov npe ntawm qhov zoo ntawm txheej txheej polymer:

• ob npaug tiv thaiv corrosion;
• kev pab cuam lub neej mus txog 30-50 xyoo;
• kev zoo nkauj uas tso cai rau koj los tsim cov tswv yim sib txawv;
• tiv taus qhov cuam tshuam tsis zoo ntawm ib puag ncig txhoj puab heev, suav nrog tshav ntuj ncaj qha thiab hloov pauv qhov kub thiab txias.

Ua tsaug rau kev qhia paub thev naus laus zis, kev tsim cov ntawv txheeb tau ua tiav, uas tuaj yeem raug tshem tawm thiab rov siv dua ntawm lwm qhov chaw.

Hom kev txheeb xyuas

C21 corrugated board, nthuav tawm los ntawm cov tuam txhab ua lag luam ntawm kev lag luam hauv ntu sib xws ntawm cov khoom lag luam hauv tsev, yog ua los ntawm cov hlau zoo. Nyob rau tib lub sijhawm, xaiv nrog galvanizing, xim tshwj xeeb thiab txheej txheej tiv thaiv muaj rau cov neeg siv khoom. Nws yog nrog qhov ntsuas no hauv siab tias cov ntawv txheeb tau muab faib ua ob pawg loj. Txhua ntawm lawv muaj nws tus yam ntxwv tshwj xeeb hauv kev ua tau zoo.

Tsis pleev xim

Hauv qhov no, peb tab tom tham txog qhov yooj yim tshaj plaws ntawm kev tsim cov ntaub ntawv cov ntaub ntawv. Hlau ntawm qhov sib xws zoo nrog thov txheej zinc yog siv ua qhov khoob. Cov txheej no tau tsim los tiv thaiv cov vaj huam sib luag los ntawm kev xeb. Vim tias tsis muaj cov xim thiab txheej txheej polymer nyob rau saum npoo ntawm cov ntawv txheeb, cov nqi pheej yig yuav yog qhov tseem ceeb sib tw kom tau txais txiaj ntsig.

Pleev xim

Hom khoom no siv hauv kev vov tsev thiab lwm yam haujlwm muaj qee yam tshwj xeeb. Cov xim thiab tiv thaiv txheej tuaj yeem siv rau ntawm ib lossis ob sab. Ntxiv rau kev txhim kho cov txiaj ntsig kev ntsuas tseem ceeb, kev siv thev naus laus zis tuaj yeem nthuav dav ntau yam ntawm cov khoom lag luam. Vim li ntawd, tus neeg siv khoom tuaj yeem xaiv yuav luag txhua yam xim.

Qhov ntev thiab qhov tshwj xeeb

Kev ua haujlwm (tsis suav nrog kev sib dhos ua ke sib tshooj) thiab tag nrho cov dav ntawm cov vaj huam sib luag yog 1000 thiab 1051 hli, feem. Nyob rau tib lub sijhawm, cov tuam ntxhab muab cov ntawv sib txawv ntawm qhov ntev ntawm lub khw. Raws li txoj cai, cov tuam txhab tsim cov khoom lag luam, qhov loj me ntawm qhov uas nyob ntawm qhov kev xav tau ntawm cov neeg siv khoom . Feem ntau, qhov ntev ntawm cov ntawv sib txawv hauv qhov dav dav nrog cov qib ntawm 10 cm. Qhov ntsuas qhov ntsuas yog 6 meters. Raws li kev coj ua tau qhia, nws yog cov qhov ntev uas yooj yim tshaj plaws rau kev thauj mus los thiab feem ntau ntawm kev ua haujlwm. Qhov no muaj feem cuam tshuam thaum tsim lub ru tsev los ntawm cov laug cam. Qhov siab tshaj plaws ntawm cov ntawv txheeb mus txog 12 meters.

Paub txog qhov tsis tseem ceeb, koj tuaj yeem yooj yim decipher lub npav. Piv txwv li, daim ntawv qhia C21-1000-0, 55:

• 21 yog qhov siab ntawm nthwv dej, uas yog, trapezoid, hauv millimeters;
• 1000 - ua haujlwm (muaj txiaj ntsig) dav hauv millimeters;
• 0, 7 - tuab ntawm thawj daim hlau hlau siv rau kev tsim cov ntawv.

Nws ua kom yooj yim tshaj plaws kev thauj mus los, nqa hauv qhov chaw thiab teeb tsa nws tus kheej, qhov hnyav me me ntawm cov khoom. Piv txwv li, thaum siv los ua vaj huam sib luag vov nrog tuab ntawm 0.7 hli, qhov hnyav ntawm ib "square" ntawm txheej yuav yog 7.4 kg. Lwm qhov tseem ceeb yog txiav daim ntawv kom ntev hauv thaj tsam ntawm 1 txog 12 meters . Coj mus rau hauv tus account qhov nruj thiab muaj peev xwm ua kom muaj peev xwm nce ntxiv, qhov no tso cai rau koj kom txo qis tsawg kawg ntawm cov pob qij txha thaum lub sijhawm teeb tsa. Qhov no yog qhov tshwj xeeb tshaj yog thaum ua haujlwm vov tsev.

Nws yog qhov tsim nyog yuav tsum tau them sai sai rau cov yam ntxwv tseem ceeb xws li qhov hnyav ntawm daim ntawv profiled. Qhov hnyav ntawm ib lub ntsuas ntsuas thiab ib qho "square" muaj txiaj ntsig nyob ntawm qhov tuab ntawm cov khoom raws li hauv qab no:

• S-21-100-0, 4-4.45 kg;
• S-21-100-0, 4-4.9 kg;
• S-21-100-0, 5-5.4 kg;
• S-21-100-0, 55-5, 9 kg;
• S-21-100-0, 6-6.4 kg;
• S-21-100-0, 65-6, 9 kg;
• S-21-100-0, 7-7.4 kg;
• S-21-100-0, 8-8, 4 kg.

Txhawm rau txiav txim kom raug qhov hnyav ntawm pawg thaum yuav khoom, nws yuav tsum tsim kom muaj qhov sib npaug ntawm cov ntsuas ntsuas los ntawm qhov ntev ntawm cov ntawv txheeb, nrog rau lawv tus lej. Qhov ntsuas tom ntej yog qhov dav ua haujlwm ntawm C21 cov ntawv txheeb . Tus nqi no yog txiav txim siab los ntawm kev suav qhov sib txawv ntawm qhov dav dav ntawm lub vaj huam sib luag thiab tus nqi ntawm kev teeb tsa sib tshooj.

Los ntawm txoj kev, qhov ntsuas no kuj tseem raug coj mus rau hauv tus account thaum xam thaj tsam ntawm cov txheej tsim thiab cov khoom siv xav tau.

Nuances ntawm kev xaiv

Ua ntej yuav ib lub tsev twg thiab cov khoom tiav, nws raug nquahu kom koj paub koj tus kheej nrog nws cov khoom tseem ceeb thiab cov yam ntxwv. Qhov no yuav tso cai rau koj xaiv qhov raug, coj mus rau hauv tus account cov haujlwm tshwj xeeb. C21 kev ua haujlwm hauv av tsis muaj qhov tshwj xeeb. Thaum xaiv cov ntawv, nws yog qhov tsim nyog los txiav txim siab tus lej ntawm cov ntsiab lus tseem ceeb.

• Cov ntawv me me . Thaum xam cov naj npawb ntawm cov vaj huam sib luag xav tau, nws yog ib qho tseem ceeb uas yuav tsum xav txog cov yam ntxwv ntawm kev tsim qauv yav tom ntej. Raws li tau sau tseg, qhov ntev yuav tsum tau xaiv coj mus rau hauv tus account lub hom phiaj ntawm kev siv cov ntawv corrugated.
• Cov duab zoo Qhov siab ntawm trapezoid hauv qhov no yog 21 hli, uas tuaj yeem nkag siab los ntawm kev kos. Nws yuav tsum raug sau tseg tias vim yog qhov loj me thiab cov duab, qhov kev sib tshooj ntawm qhov ntev tau raug txo qis thaum txhim kho. Raws li qhov tshwm sim, nws yooj yim dua los kho cov ntawv, thiab cov txheej txheem nws tus kheej tau nrawm dua thiab cuam tshuam nrog kev siv cov peev txheej tsawg.
• Lub thickness ntawm daim ntawv, uas tus nqi ntawm cov khoom ncaj qha nyob ntawm . Ntawm qhov one tes, cov ntaub ntawv tuab dua, kim dua nws yuav raug nqi rau tus neeg yuav khoom. Nyob rau tib lub sijhawm, nws yog qhov ntsuas no uas yuav txiav txim siab cov yam ntxwv tseem ceeb ua tau raws li lub zog, kev ntseeg tau, tiv thaiv kev cuam tshuam sab nraud thiab ua haujlwm ntev.
• Qhov hnyav ntawm pawg thawj coj saib corrugated yog C21 . Tus yam ntxwv no yuav tsum raug coj mus rau hauv tus account txawm tias nyob rau theem kev npaj ua tiav ntawm txhua txoj haujlwm. Qhov no yog qhov tseeb tshwj xeeb thaum suav lub rafter system ntawm lub ru tsev yav tom ntej. Nyob rau tib lub sijhawm, thaum txhim tsa cov qauv phab ntsa, laj kab thiab teeb meem, lub zog ntawm cov qauv yuav feem ntau yog nyob ntawm qhov raug ntawm kev suav.

Nws kuj tseem pom zoo kom coj mus rau hauv tus account thaum xaiv hom kev pov hwm. Tam sim no, cov hom ntawv txheeb xyuas hauv qab no muaj rau cov neeg yuav khoom muaj peev xwm:

• nrog zinc txheej, tsis muaj txheej tiv thaiv ntxiv;
• galvanized panels nrog polymer txheej ntawm ib sab;
• galvanized profiled nplooj ntawv nrog cov txheej polymer ruaj ruaj ntawm ob qhov chaw.

Coj mus rau hauv tus account cov haujlwm ua haujlwm, qhov kev xaiv thib peb yog tus thawj coj tsis muaj kev sib cav. Nws qhov txiaj ntsig tseem ceeb yog lub neej ua haujlwm siab tshaj plaws thiab muaj kev tiv taus siab rau kev siv tshuab thiab tshuaj lom neeg. Lub ntsej muag ua lub luag haujlwm tseem ceeb ib yam. Tab sis tsis txhob hnov qab tias cov ntawv zoo li no yuav raug nqi ntau dua li cov galvanized uas yooj yim.

Cov ntawv thov

Hom piav qhia ntawm pawg thawj coj saib corrugated yog ib qho uas tshwm sim ntau tshaj plaws vim nws cov yam ntxwv tseem ceeb. Cov ntawv zoo li no tau siv dav hauv kev tsim kho niaj hnub no. Hauv lwm lo lus, lawv tsis tuaj yeem tsuas yog npog lub ru tsev lossis npog ib tus neeg yam ntxwv ntawm cov tsev. Cov khoom siv yog siv thaum ua ntau qhov kev tsim kho thiab ua tiav. Peb teev cov cheeb tsam tseem ceeb ntawm kev thov C21 cov ntawv txheeb.

• Kev tsim kho lub ru tsev rau cov tsev nyob, cov tsev tsim tawm, nrog rau kev lag luam thiab lwm lub tsev. Nws yog ib qho tseem ceeb los txiav txim siab tias lub kaum sab xis ntawm lub ru tsev hauv qhov no tsis muaj teeb meem.
• Kev teeb tsa lub tsev ua tsev prefabricated thiab cov qauv ib ntus. Cov no suav nrog cov tsev khaws khoom, pavilions khw, chaw rau tsheb thiab ntau dua.
• Kev tsim cov ntawv me me.
• Erection ntawm cov qauv thav duab, suav nrog txhaws diaphragms.
• Cov vaj huam sib luag rau laj kab thiab teeb meem ntawm yuav luag txhua qhov teeb tsa thiab tsis yooj yim.
• Tsim cov insulated thiab "txias" phab ntsa qauv.
• Phab ntsa cladding ntawm ntau chav thiab tsev.

Ntxiv rau qhov saum toj no, lub rooj tsav xwm corrugated tau siv los tsim cov khoom zoo thiab zoo nkauj zoo nkauj nyuaj nyuaj vaj huam sib luag.

Mounting

Ua ntej koj pib tso daim ntawv profiled thaum ua tiav cov txheej txheem phab ntsa lossis txhim kho lub ru tsev, koj yuav tsum tau saib xyuas kev npaj cov lathing. Ib qho ntxiv, thaum ua haujlwm vov tsev, koj tseem yuav xav tau cov ntawv hla thiab lub foob pob zeb.

Nws tseem yog ib qho tseem ceeb uas yuav tsum tau them sai sai rau cov tseev kom muaj rau cov txheej txheem kev teeb tsa vaj huam sib luag thiab tus naj npawb ntawm cov ntsia hlau rau 1 m2. Qhov tseem ceeb tshwj xeeb yuav yog kev tiv thaiv kev tsim cov kuab paug, uas tshwm sim yam tsis pom kev nrog kev siv cov ntaub ntawv tsis zoo ua los ntawm cov hlau.

Nws yuav yog qhov zoo tshaj los xav txog cov yam ntxwv ntawm kev teeb tsa siv piv txwv ntawm kev npaj lub ru tsev. Cov txheej txheem no muaj qee qhov tshwj xeeb.

• Lub suab thiab tuab ntawm cov laug cam yog txiav txim siab los ntawm kev muaj peev xwm ntawm cov khoom siv vov tsev, uas yog, cov laug cam. Thiab tseem daim ntawv teev cov yam tseem ceeb suav nrog muaj peev xwm thauj khoom ntawm txheej, lub kaum sab xis ntawm lub ru tsev nqes hav thiab qhov deb ntawm cov ntsiab lus ntawm lub rafter system. Kev kho kom raug ntawm cov ntawv muab rau cov lathing kauj ntawm 30 cm nrog qaij ntawm 15 degrees. Cov lus pom zoo ntawm cov laug cam yog 30x100 mm. Nws yog ib qho tseem ceeb kom nco ntsoov tias qhov ntsuas no yuav nyob ntawm seb cov rafters nqis.
• Yog tias txoj kab nqes hav muaj cov duab plaub, tom qab ntawv cov ntawv nrawm tuaj yeem pib los ntawm qhov kawg ntawm lub ru tsev. Hauv cov xwm txheej thaum nws los txog rau lwm cov duab geometric, nws yog qhov tsim nyog los ua thawj qhov kev suav uas tsim nyog los ntawm kev teeb duab hauv daim duab. Ncaj nraim ntawm cov pob kws, cov ntawv tau nrawm nrog tus kheej tapping screws nrog lub suab ntawm 30 txog 40 cm. Ntawm kab tom ntej, cov khawm no tau txav mus los txhua 100-150 cm., thiab hauv qhov chaw ntawm cov pob qij txha txuas ntev - los ntawm 30 txog 50 pom 1 sq. m ntawm lub ru tsev siv 7-10 tus ntsia hlau.
• Raws li cov thev naus laus zis siv, cov cuab yeej ntawm cov pob kws muab rau ib qho nyuaj ntawm kev siv. Qhov no hais txog kev tsim kom zoo nkauj ntawm qhov nqes hav, kev teeb tsa lub qhov dej, nrog rau kev muab huab cua ntws hauv qab lub ru tsev.
• Skates tuaj yeem sib txawv. Qhov yuav tsum tau ua ua ntej rau qhov no yuav yog kev teeb tsa cov khoom ntxiv ntawm lub crate ncaj qha ntawm cov ntsiab lus txuas. Nws yog ib qho tseem ceeb uas yuav tau xav txog tias qhov chaw nyob hauv qab toj yuav tsum muaj cua. Ntawm lub ridge, daim ntawv tau nrawm los ntawm trapezoid (yoj) nrog tshwj xeeb tus kheej tapping screws 4, 8x70 qhov loj me.
• Thaum txhim kho cov ntawv txheeb ntawm qhov kawg ntawm lub ru tsev, nws yog qhov tsim nyog los ua lub qhov rooj khoov los ntawm 5 txog 7 cm. Qhov kawg nws tus kheej feem ntau yog xaws nrog lub rooj cua. Hauv qhov no, cov plank tau teeb tsa rau sab saum toj ntawm qhov profile nrog ridge tus kheej tapping ntsia hlau nrog lub suab ntawm 50-60 cm.

Tom qab ua tiav txhua txoj haujlwm teeb tsa, txhua qhov khib nyiab yuav tsum tau ua tib zoo tshem tawm ntawm qhov chaw. Hmoov tsis zoo, nws tsis tuaj yeem zam qhov pom ntawm khawb ntawm txheej, uas yuav tsum tau pleev xim tam sim ntawd. Nws raug nquahu kom tshem tawm cov khoom txawv teb chaws thiab cov plaub hau nrog lub dav hlau dej lossis txhuam txhuam mos. Tom qab tu lub ru tsev nqes hav, koj yuav tsum tshem tag nrho cov khib nyiab los ntawm txhua qhov ntawm cov txheej txheem dej.

Ib qho tseem ceeb yuav tau coj mus rau hauv tus account qhov ntev ntawm cov ntawv txheeb tau siv . Yog li, yog tias lawv qhov ntau me me, tom qab ntawv yuav tsum ib txwm pib los ntawm kab hauv qab. Qhov no siv rau ob qho kev vov tsev thiab phab ntsa.

Raws li kev xyaum qhia, qhov muaj feem ntau yuav yog yuav, yog tias ua tau, lub rooj sib tham corrugated, ua kom haum nrog kev pov hwm yav tom ntej. Qhov no yuav tsis tsuas yog ua kom nrawm dua thiab ua kom yooj yim rau kev teeb tsa, tab sis kuj yuav txo tus naj npawb ntawm cov pob qij txha.