Heads and shells 封头和壳体
external pressure heads and shells 外压封头和壳体
Reserving Heads And Shells 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。
Shell and devein prawns, reserving heads and shells.
先剥虾，保留头部和外壳。
Thing axe-heads themselves would serve indeed have served in some societies and over a very large area of south-east asia cowry's shells were used the most often quoted form of primitive money.
这种“货币”可能是任何一种为大家所接受的东西——斧头本身就有此用处，而且的的确确在有些社会里已这样用了。 在东南亚的广大地区，人们曾经将宝贝贝壳当货币，这是最常提到的原始货币形式。
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