控制部份采用电子及电气元件，执行机构为气动。
Electronic and electrical components are used for the controlling parts and pneumatic ones for the actuators.
压力阀是用来控制液压系统的压力和防止油泵及执行元件的过载。根据功能可分为溢流阀、减压阀、顺序阀、卸荷溢流阀等。
Pressure control valves are used for controlling the pressure in a hydraulic system and protect its hydraulic pump and actuators from over-load.
公司主要产品有：气动控制元件（阀）、执行元件（气缸）、石油、化工、码头、运输、水电、建筑、维修自动设备医疗仪器及教学设备等生产厂家。
The main products of the compan yare pneumatic control components(valves), executive components(cylinders), gas-source treatment components, auxility components and whole set system.
公司主要产品有：气动控制元件（阀）、执行元件（气缸）、石油、化工、码头、运输、水电、建筑、维修自动设备医疗仪器及教学设备等生产厂家。
The main products of the compan yare pneumatic control components(valves), executive components(cylinders), gas-source treatment components, auxility components and whole set system.
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