启闭 meaning in Chinese

start and stop; on and off
◇启闭机 headstock gear; 启闭压力 engaging pressure

Mushroom outlet closing and opening by hand to be inspected
菌形风帽手动启闭试验。
Small operation torque , easy opening and closing
操作扭矩较小,启闭容易。
Headstock gears with screw stem . types and basic parameters
螺杆式启闭机.型式和基本参数
Specification for headstock gears with screw stem
螺杆式启闭机.技术条件
Small and middle size hydraulic headstock gears . basic parameters
中小型液压闸门启闭机.基本参数

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