Check drain valve to make sure that it is closed.

检验排水阀，确保排水阀处于关闭状态。

Leave the drain valve of the holding tank opened.

让贮槽的排水阀打开.

Make sure that the drain valve of wash tank is closed.

请确认主洗缸排水阀是否被关闭.

Make sure that the drain valve of rinse tank is closed.

请确认过水缸排水阀是否被关闭.

Students check the automatic drain valve of the front end of the valve is open.

检查自动排水阀前端之球阀是否打开。

Some older people on a regular basis filter valve to open the drain valve for water below.

比较老的一些过滤减压阀人们定期打开下面的排水阀来防水。

The device is essentially composed of a water tank, a filter screen, a drain valve, a hollow bolt, etc.

该装置主要由水箱、滤网、排水阀、空心螺栓等组成。

On Table Top models, the front panel must be removed to gain access to the drain valve.

应该排水阀上有螺纹，可连接标准软管。对于橱柜类型热水器，前部面板…

Oil filter housing drain valve

滤油器壳体排油阀

Fuel filter housing drain valve

燃油滤清器壳体放油阀