1. Kub iav number case kub, tseem hu ua kub tempered iav number case, kub sintering yog 720-850 ℃, tom qab kub kub tempering, tus number case thiab iav tau khov kho ua ke. Siv dav hauv kev tsim cov ntaub thaiv phab ntsa, iav iav, iav iav, thiab lwm yam 2. Tempered iav number case: ...
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