Niaj hnub no, muaj kev xav tau ntau ntxiv rau cov ntawv yas corrugated nyob rau hauv kev ua lag luam, thiab cov neeg siv feem ntau yuav pom tias nws qhov zoo ntawm kev ua lag luam tsis sib xws, uas yog teeb meem heev.Tom qab ntawd peb qhia qee txoj hauv kev kom paub qhov zoo ntawm cov ntawv yas corrugated:

Thawj txoj kev yog pinch, vim hais tias lub hardness ntawm lub hollow board yog qhov phem tshaj, lub ntug ib feem ntawm lub hollow board yuav dented los ntawm txhais tes.Yog tias nws pom tias lub rooj tsavxwm hollow yog dented maj mam, thiab txawm tias cov duab qub tsis tuaj yeem rov qab los tom qab lub dents, Los yog nws tuaj yeem raug torn los ntawm maj mam rub nws nrog koj txhais tes.Hom hollow board no yuav tsum yog cov hollow board zoo.

Qhov thib ob txoj kev yog saib seb qhov saum npoo ntawm lub hollow board muaj ib qho gloss thiab xim ntawm nws cov hlaws.Qhov zoo tshaj plaws hollow board yog ua los ntawm cov khoom siv tshiab, nrog cov xim zoo nkauj, tsis muaj pitting, me me, npauj, thiab lwj.Thiab muaj lwm yam teeb meem.