Openings, head and shell, computation of.

开孔，封头和壳体，计算。

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A turtle obtrudes its head from its shell.

龟将它的头从甲壳中伸出来。

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The pump head, pump shell, seal chamber parts can with insulation jacket.

泵头部、泵壳体、密封腔部分均可以带保温夹套。

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He has a shell on his head.

他的头上有个痹忧。

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He has a shell on his head.

他的头上有个痹忧。

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