draft-tube floor 尾水底板
hollow steel tube concrete floor 空心钢管混凝土楼盖
cast-in-situ concrete core tube floor 现浇混凝土筒芯楼盖
Coast Guard rescuers airlifted the men from the mangled raft, which by then had also lost its floor and resembled a giant, battered black inner tube.
海岸警卫营救队员们将几个人从破烂不堪的救生筏中救了出来，筏底已经不知去向，整个救生筏就如同一只巨大的黑色残破内胎。
The rough, rocky floor of the Indian Tunnel lava tube.
粗糙的，岩石层的印度熔岩隧道管。
The basic building components are galvanized tube steel for the base, structural insulated metal panel for walls, floor and roof and can be customized with conventional interior and exterior finishes.
其基本建筑构件为镀锌钢管、墙体、楼板、屋面的结构隔热金属板，可与传统的内外饰面进行定制。
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