... 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
Shell and devein prawns, reserving heads and shells.
先剥虾，保留头部和外壳。
The shells and heads of those two reactors were made by titanium-clad plate owing to the bad operation condition and the strong corrosivity of medium.
由于操作条件恶劣、介质腐蚀性强，两反应器壳体和封头均采用了钛复合板。
We are like turtles in a traffic jam-the best we can do is to pull our heads into our shells and shut our eyes. But that's a good way to get the life crushed out of us, as any dead turtle can attest.
就好比交通事故中的乌龟一样，我们能做的是把脑袋伸进壳里，然后闭上眼睛……这是丢掉性命最好的方式，很多丢掉性命的乌龟都证实了这一点。
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