ntau npaum li cas rau pvc pem teb npav daim kab xev
Ib yam rau cov nqi hauv pem teb nqi yog cov thickness.
Nyob rau hauv qhov tseeb, lub thickness yog ntau npaum li cas muaj feem xyuam rau tus nqi, thiab tuab kuj txhais tau tias lub neej ntawm daim kab xev rau hauv pem teb. Nws feem ntau zoo li 0.1 hli mus rau 0.17mm. Cov khoom zoo tib yam, ntawm chav kawm, yog ib tug tuab lub neej ntev, ntawm chav kawm, tus nqi yog tseem siab.
Zoo siab txais tos rau peb:
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