... hand-operated duster 手摇喷粉器 hand-operated gate 手动闸门 handshaking modem 信号交换式调制解调器 ...
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The opening and the closing of the gate valve are realized by a manual pump; the past bulky gate valve with a hand-operated screw rod is replaced.
闸阀的开启和关闭靠手动泵来实现，取代了过去手摇丝杠的笨重闸阀。
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