This kind of character not only can endure the concrete bottom board weight, but also may endure inevitable external pressure and impulse during the construction period.

这种长久抗压性不但能抵受混凝土底板重量及其荷重，并可抵受在施工期间不可避免的外来压力及冲击力。

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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.

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。

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In addition, concrete cushion plays critical bracing function on controlling lateral deformation of the retaining wall, which is similar to the reinforcement concrete bottom plate.

同时，素混凝土垫层对围护墙体变形具有一定的支撑效应，在一定程度上能起到类似结构底板的作用。

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Small island states and many of the world's poorest nations are demanding that Cancun must see agreement of a legally binding global treaty, but many others are pushing for a "bottom-up" approach that would seek small but concrete agreements in key areas such as REDD.

BBC: Rich countries accused of carbon 'cheating'