[zhá]
[名]
（水閘） floodgate; sluice gate
（制動器） brake
backpedalling brake; coaster brake
腳閘
take off the brake
開閘
step on the brake
踩閘
apply the hand brake
捏閘
[口] （電閘） switch
a two-way switch
雙向閘
operate a switch; switch on or off
扳閘
[動]
（截住水） dam up [out] water