To change this four-wayvalve will only take five minutes.
换这个四通凡尔只需要五分钟。
2
After leaving the air pump this heat-transfer medium goes into the system inner circuit through Four-wayvalve 8 which is inside the building.
离开气泵后传热介质进入系统内部电路通过四通阀8在这座建筑。
3
A by-pass capillary tube was added on the discharge pipe behind the four-wayvalve and a tube was added in an accumulator in a heat pump system to solve the problem.