国产爆乳美女娇羞呻吟麻豆_AV漫画免费版在线观看_国产粉嫩又粗又大又色的_精品爽爽VA在线观看调教软件_亚洲精品午夜在线无码

Fault judgment and elimination of electro-hydraulic valve:

Electro-hydraulic valve is a reasonable control valve in principle and structure at present. The rationality of its structure is fully reflected in fault judgment and maintenance. The fault judgment of the electro-hydraulic valve is very simple. With the help of the three regulating ball valves of the electro-hydraulic valve itself, the fault location can be accurately determined. Maintenance is also very easy, simply remove a few catheters, a few nuts. It is not necessary to light the medium in the pipeline during repair, but only need to close all the three regulating ball valves on the valve, and only a small amount of medium will overflow when disassembling or unloading parts.