Now the refrigerant, as a high-pressure, cooled liquid, confronts a flowrestriction which causes the pressure to drop.
制冷剂就变成了高压冷却的液态，然后经过一个节流器，节流器使其压力下降。
2
However, these advantages may be outweighed by the flowrestriction the element creates in the intake line and the negative effect this has on pump life.
但是问题是滤芯会对吸入管线中流量造成限制，泵的寿命也会收到影响。
3
In distribution systems where high point vents are not installed, high velocity flow and flowrestriction techniques can be used to ensure complete filling of the system.