... torispherical knuckle radius 带折边的球形，转角半径 heads and shells 封头和壳体 external pressure out-of-roundness 外压，不圆度 ...
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external pressure heads and shells 外压封头和壳体
Reserving Heads And Shells 保留头部和外壳
Shells and Heads 容器壁及顶
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Shell and devein prawns, reserving heads and shells.
先剥虾，保留头部和外壳。
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