由启闭装置的不同型式可分为手动式、电动式、手电动式三种。
The penstock can be divided into manual type, manual and electric type, electric type according to the headstock.
本实用新型涉及一种客车车门的自动启闭装置，特别是一种客车车门自 动滑移装置。
The utility model relates to an automatic opening and closing device of a bus door. The utility model particularly relates to an automatic sliding device of the bus door.
广泛适用于石油化工，火力发电厂等油品、水蒸汽管路上作接通或截断管路中介质的启闭装置。
Widely used as the device of open or close to connect or cut off the medium inside of the pipeline of water, steam or oil goods in steam power plants.
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