throttle pipe valve

基本解释

A disk turning on a diametrical axis inside a pipe, used as a throttle valve or damper.
节流阀，减压阀：管道内沿直径中心轴线上的圆片状旋钮，用作节流阀门或阀门。
Butterfly valve through the valve shaft rotation to drive the rotation of a disc-shaped disc, to open and close a valve, cut off from the main pipe and throttle with.
进口蝶阀是指通过阀轴旋转来带动一个圆盘形的蝶板的转动，达到开启与关闭的一种阀门，在管道上主要起切断和节流用。
The basic working principle of automotive cooling system is expounded here with the emphasis on the characteristics of the two cooling systems: expansion valve throttle and pipe throttle.
阐述汽车空调制冷系统的基本工作原理，着重叙述膨胀阀式节流与孔管式节流制冷系统的特点。