Light travels slower through water, glass, even air, than through a vacuum.
光在水、玻璃，甚至是空气中的传播速度比起在真空中慢得多。
Vacuum connection 14. Bucket with ice and water.
真空连接器14装有冰和水的桶子。
Water ring vacuum pump in the waste water and air into the tank together.
水环式真空泵中废弃的水和空气一起被排到水箱里。
The height of the vacuum tank is generally 2 times the diameter water tank .
真空水箱的高度一般为水箱直径的2倍。
Troubles and their removal for water ring vacuum pump in paper mills;
介绍了水环真空泵的工作原理、工作流程及其在苯胺生产中的应用情况。
Double wall vacuum-insulated keeps water hot while saving energy and money.
双层真空隔热保持热水，同时节省能源和金钱。
Do not immerse in water and do not use to vacuum water.
不要浸入水中，也不要用于吸取液体。
Running water, radio static, ora vacuum or washer as white noise.
打开水龙头、收音机静电噪音、吸尘器和洗衣机制造白噪音。
Running water, radio static, ora vacuum or washer as white noise.
打开水龙头、收音机静电噪音、吸尘器和洗衣机制造白噪音。
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