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forging heat treatment
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forging heat treatment
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forging heat treatment
锻件热处理
在机械加工之前,通过对锻件在一定温度范围内的加热、保温和控制冷却来改变内部组织和性能的工序。
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soil and water conservation regionalization
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soil and water conservation supervision and management on production and construction projects
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soil and water conservation tillage measures
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soil and water loss control law
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soil and water loss in China
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