For the repair and maintenance of the elevator parts will affect the normal use of the whole equipment, which has a certain relationship to the whole life of the construction elevator.
对于升降机配件的维修和保养工作会影响到整个设备的正常使用，这对建筑升降机的整个运行寿命也有一定的关系。
Usually installed in the valve, pressure relief valves, water valves or other devices given the import side, the medium used to remove impurities, to protect the normal use of valves and equipment.
通常安装在减压阀，泄压阀、定水位阀或其它设备的进口端，用来消除介质中的杂质，以保护阀门及设备的正常使用。
The installation and use of air-conditioning equipment shall help maintain the city appearance, ensure smooth traffic, and avoid disturbing the normal work and life of others.
安装、使用空调设备应当维护市容整洁，保障交通畅通，避免妨碍他人的正常工作、生活。
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