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楔形闸阀 xiēxíng zháfá
hydroel.st. wedge type gate valve
oil wedge gate valve
shipb. wedge sluice valve; wedge action valve
楔形闸
tech. wedge action valve; wedge sluice valve; wedge-type gate valve; wedge valve
楔形闸阀: 3 phrases in 2 subjects
Shipbuilding2
Technology1