安装，故障排除和维护动力传动，真空，液压和气动系统以及可编程逻辑控制器。
Install, troubleshoot and maintain power transmission, vacuum, hydraulic and pneumatic systems, and programmable logic controls.
双管路液压制动系统带真空助力。
汽车制动系统绝大多数是双管路真空助力液压制动，其中传递制动力的制动液有极强的吸水性。
Automobile brake system most is double pipeline vacuum booster, which relay system hydraulic braking power brake fluid strong absorbent.
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