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钛合金零件真空热处理
Vacuum heat treatment of titanium alloy parts
价格：￥0.00
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中碳钢与中碳合金结构钢马氏体等级
Martensite grade of medium-carbon steel and medium-carbon alloy structural steel
价格：￥0.00
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真空热处理
Vacuum heat treatment
价格：￥0.00
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化学热处理渗剂 技术条件
Technical requirement of medium for thermo-chemical treatment
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