“flapper valve”可以造什么句，flapper valve造句

2、single-jet flapper valve

4、Electric or hydraulic flapper valves are usually equipped with non-metal sealing butterfly valve system to use.

1、bulkhead flapper valve

5、Take an empty two-liter soda bottle, wash it out, fill it with water, screw the lid on tightly and set it into your toilet tank, as far away from the flapper valve as possible.

3、According to structural characteristics of a flapper valve, flapper valves, butterfly valves, ball valves, diaphragm valves, Angle valves, through the valve, three-way valve.