今天最常用的旋转泵是外齿轮泵、内齿轮泵、摆线转子泵、滑动叶片泵和螺旋泵。每种类型的泵都有优点，适合于特定场合的应用。
The most common rotary-pump designs used today are spur-gear, generated-rotary, sliding-vane, and screw pump, each type has advantages that make it the most suitable for a given application.
主要生产各类电子开关插座包括叶片开关，轻触开关，拨动开关，滑动开关，推动开关，按钮开关，按键开关，自锁开关。
Mainly produces all kinds of electronic switch socket including the leaf switches, touch switches, toggle switches, slide switches, push switch, button switch, key switch, self-locking switch.
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