... Multitude of standard stroke lengths 众多的标准行程长度 Single and Double Acting 单和双代理 Single and Double Rod 单 ， 双杆 ...
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Ball points Single and double acting models.
球阀分单作用和双作用两种型号。
Pneumatic piston actuators can be divided into single and double acting two.
气动活塞式执行机构可分为单作用和双作用两种。
AW series of large diameter valves using pneumatic actuator fork-type transmission, reasonable structure, output torque, a double-acting and single acting.
大口径阀门采用系列aw型气动执行器拔叉式传动，结构合理，输出扭矩大，有双作用式和单作用式。
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