Valve types include Normally Open and Normally Closed valves, for use in fuel, hydraulic, or pneumatic applications.

阀门有常开和常闭两种，可用于燃油，液压或气动应用领域。

youdao

It can be easily installed in various types of rotary valves, making it the electric valve or electric control valve.

它可方便地安装在各种类型的旋转阀上，使其成为电动阀或电动调节阀。

youdao

Two common types are the fixed orifice, or the orifice tube, and the thermostatic expansion valve.

两种常见形式是固定节流阀式或节流管式，以及节流膨胀阀。

youdao

In either case, each spin valve reacts to only one sort of molecule, so the chips can search simultaneously for as many types of molecules as they have spin valves.

ECONOMIST: Labs on a chip