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Riffel steel
met.
钨工具钢
(1.2~,1.4C, 5〜 8W,0~1Cr,0~0.5V)
;
钨工具钢
碳 1.2% -1.4%, 钨5% ~ 8%,铬 0% ~ 1.0%,钒0% -0.5%
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