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A hardening medium for the case hardening of work pieces and tools of iron and steel
A hardening medium for the case hardening of work pieces and tools of iron and steel
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机译:钢铁工件和工具的表面硬化处理的硬化介质
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摘要
A case-hardening composition consists of 80 per cent of a mixture of dry or solid case-hardening substances known per se and 20 per cent of pulverised slate.
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