... dovetail seat 燕尾式阀座 cylindrical seat 筒式阀座 shoe-type seat 靴式阀座 ...
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Type E with cylindrical seat 圆柱状座的E型刀柄
cylindrical valve seat 柱状阀座
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A kind of new forming technique to manufacture the back spring seat was proposed, called drawing-multi-step sinking with the cylindrical-forming process.
提出了一种生产后簧座的工艺方法：拉深—多步缩口—成形。
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