HZK esferik woulo bi apwopriye pou reziste chaj lou ak chaj enpak.(22200,22300,23000,23100,23200,24000,24100, 24200,2,0200,20300series ak seri sele) -Tretman chalè nan Bainite -Alman fanm k'ap pile pwosesis segondè estabilite tanperaman.-Seri an antye nan pwodwi segondè-presizyon ...
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