Thaum txhim kho li qub, khaws cov ntsiab lus hauv siab thaum siv fluorine lined li qub
Thaum txhim kho li qub, khaws cov ntsiab lus no hauv siab thaum siv cov fluorine lined li qub Muaj ntau lub li qub muaj cov kev taw qhia, xws li lub ntiaj teb valve, throttle valve, siab txo valve, kos valve, thiab lwm yam, yog tias ntsia rov qab, nws yuav cuam tshuam rau kev siv cov nyhuv. thiab...
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