water gate operator 水门运营商
gate power operator 自动开关门机
gate valve operator 闸阀操纵器
Gate Logistic Operator 大门物流操作工
以上来源于: WordNet
Automatic Gate Operator is the product integrate with mechanism and electricity, it USES commonly in abroad.
电动开门机属机电一体化化产品，国外使用非常普遍。
The device by the human operator launches, such as through the cone-shaped gear reducer drive, direct drive valve stem up and down movement of the valve gate.
本装置由人力操作手轮，通过锥形齿轮等减速传动，直接驱动阀门阀杆上下移动，启闭阀门。
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