The metal shell has a main shell and at least an assembled opening which is arranged on the main shell.

该金属壳件具有一主壳体及至少一组装开口，该组装开 口设置于该主壳体上。

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The span between two such diaphragm walls can easily be bridged with precast reinforced concrete beams or a cast in-site reinforced concrete slab to complete the main shell of the tunnel.

使用预制钢筋混凝土梁或者现浇钢筋混凝土板会很容易将两侧地下连续墙的跨度空间连接起来，从而完成隧道的主壳。

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The main reason to shell out for a score is to check it about six months before you want to get a mortgage or car loan.

WSJ: Getting Going: Why Aren't Credit Scores Free?

Main Street is a ghostly shell, and efforts to revive the place continue to stall.

ECONOMIST: Pine Bluff prepares for disposal

Friday night it gave foreign oil interests in Nigeria, especially Shell, which the main operator in Niger Delta, till midnight Friday to leave the area or face what one commander called total war.

NPR: Nigerian Authorities Seek Release of Contractors