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真空渗氮法？
Gas nitriding or vacuum nitriding?
youdao
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运用正交试验法，研究H13钢气体渗氮工艺。
The gas nitriding technology of H13 steel was studied by an orthogonal test.
youdao
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运用正交试验法，研究H13钢气体渗氮工艺。
The gas nitriding technology of H13 steel was studied by an orthogonal test.
youdao