... extrus mold 挤出成形 shell cast 壳模铸造 foam form ? 泡成形 ...
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cast shell process 毛管铸造法
cast the shell 脱壳
cast-iron cylindrical shell 铸铁圆柱壳
thin shell die cast 薄壁壳形件
cast roll shell 铸轧辊辊套
to cast off the shell 蜕皮
shell cast
壳牌投
以上为机器翻译结果，长、整句建议使用 人工翻译 。
These are crustaceans that survive by dragging around a cast-off mollusc shell for protection and shelter.
ECONOMIST: Nomads at last
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