镦粗加工过程是将金属变形于纵向和径向使其截面积增大。
Upsetting. Upsetting is the process of increasing the cross sectional area by displacement of material longitudinally and radially.
软启动阀适用于在粗加工过程中调节燃气气流，能防止管道和容器中的气体动荡、真空装置的微粒污染等。
Soft start valves are used to throttle the gas flow in roughing lines. They prevent turbulences in piping and containers, particulate contamination in vacuum installations.
小杂粮粗加工主要包括脱壳和分选过程。
The means of rough processing for small grains are mainly divided into shelling and sorting.
必须进行粗加工以去除原材料轧制过程中的表面氧化脱碳。
Rough machining shall be performed so as to remove all mill decarburization from the raw material surface.
在实际生产过程中，特别是对大型零件粗加工时，选择最优的车削用量可以极大地提高生产效率。
In the process of practical production, especially for machining of large-scale parts, how to choice cutting parameters to improve production efficiency is a difficult problem.
在实际生产过程中，特别是对大型零件粗加工时，选择最优的车削用量可以极大地提高生产效率。
In the process of practical production, especially for machining of large-scale parts, how to choice cutting parameters to improve production efficiency is a difficult problem.
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