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Yuav ua li cas tuav lub qhov rais thiab qhov rooj hauv tsev
1. Thaum lub sij hawm siv aluminium alloy qhov rooj thiab qhov rais, lub zog yuav tsum yog lub teeb, thiab lub laub thiab rub yuav tsum yog ntuj; yog tias koj pom nws nyuaj, tsis txhob rub lossis thawb nyuaj, tab sis teeb meem ua ntej. Plua plav txuam thiab deformation ...Nyeem ntxiv
Thov Ib Daim Ntawv Tso Cai Dawb
