预制混凝土楼盖
Precast concrete floor
以上为机器翻译结果，长、整句建议使用 人工翻译 。
本发明的特征在于：所制成的混凝土叠合空心楼盖内部含有带钢骨肋2预制混凝土底板1。
The invention has the characteristics that the fabricated concrete overlapped hollow floor system comprises the prefabricated concrete bottom plate 1 with the steel ribs 2.
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