Vim li cas cov fwj dej tseem ceeb zoo li tau ntim rau hauv cov fwj iav?

Cov ntawv ntim khoom ntawm cov iav tseem ceeb roj fwj tau dhau los ua ntau thiab ntau dua, feem ntau yog yas, iav, ceramics thiab ntoo. Cov fwj roj tseem ceeb ntawm cov khoom siv no muaj lawv tus kheej cov yam ntxwv thiab daim ntawv thov ntawm lub ntim. Nws kuj tseem tau ua lub luag haujlwm zoo hauv kev txhim kho kev lag luam ntim roj tseem ceeb.

Ntoo fwj roj tseem ceeb feem ntau yog siv rau cov khoom siv tes ua thiab khoom plig. Qee cov ntoo tseem ceeb roj lub raj mis caj dab tau dhau los ua neeg nyiam thiab tau txais koob meej hauv khw. Ntoo fwj roj tseem ceeb coj cov neeg siv khoom ib puag ncig yooj yim thiab nyob ntsiag to, uas yog nyob rau hauv kab nrog tus cwj pwm ntawm cov roj yam tseem ceeb.
Cov raj mis tseem ceeb ntawm cov khoom siv Ceramic qhia lawv qhov kev nyiam nyob rau hauv daim ntawv thov ntawm Suav lub raj mis roj yam tseem ceeb. Txhawm rau ua kom pom cov yam ntxwv ntawm cov khoom lag luam, Suav cov tuam txhab tsim cov roj tseem ceeb feem ntau muab qhov muaj feem thib rau cov khoom siv ceramic. Cov raj mis tseem ceeb ntawm cov khoom siv Ceramic qhia qhov kov ntawm Suav style, uas yog qhov tsis tshua muaj neeg nyiam nrog cov neeg siv.
Cov iav fwj roj tseem ceeb feem ntau yog siv hauv khw muag tshuaj pleev ib ce. Cov iav fwj roj tseem ceeb yog cov ntsiab lus tseem ceeb thiab ib txwm ua ntawm cov roj tseem ceeb ntim khoom lag luam. Daim ntawv ntim khoom no yuav txuas ntxiv mus yav tom ntej. Lub raj mis roj tseem ceeb yas tau siv ntau ntxiv hauv kev ua lag luam nyob rau xyoo tsis ntev los no vim lawv hloov xim hauv lawv cov ntim sab nrauv. Cov xim siv hauv cov fwj roj tseem ceeb feem ntau tsaus ntuj nti, vim tias cov roj yam tseem ceeb hloov pauv tau, thiab cov fwj ntim tsaus tuaj yeem tiv thaiv lub teeb thiab oxidation los tiv thaiv cov roj yam tseem ceeb kom tsis zoo.