Npauj npaim li qub yog tsim rau cov kav xa dej uas thauj ntau yam corrosive thiab tsis-corrosive kua hauv cov tshuab engineering xws li thee gas, natural gas, liquefied petroleum gas, lub nroog gas, cua kub thiab txias, tshuaj smelting, hluav taws xob tsim thiab kev tiv thaiv ib puag ncig, thiab yog siv rau ib ...
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