查询词典 backflow

A dual check backflow preventer shall be installed at each wash sink hose unit or at referenced cross-connections to prevent the reverse flow of non-potable water into the potable domestic water system.

这种双止回防回流阀应该安装在每个冲刷洗涤盆软管装置处或参照交叉连接，以防止非饮用水回流到室内饮用水系统中。

The internal flow degenerates under off-design conditions, the backflow regions increase at the descending and outlet segments and the distribution uniformities of axial velocity drop notably at the crest and outlet crosssections of the passage.

在非设计工况下，虹吸式出水流道内部流态恶化，下降段和出口段的回流区范围增大，驼峰断面和出口断面轴向流速分布均匀度显著下降。

The study said the silting-up and pollution of the Pasig River connecting Laguna de Bay with the sea on Manila Bay also obstructed the natural backflow of saltwater to nourish aquatic life.

研究报告中还提到，连接马尼拉湾与拉古那地湾湖泊的帕西格河因河床淤积与污染，使海水无法逆流为湖中生物带来养分。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。