电磁柱塞拉下通气阀，堵住通向活性碳罐的通路。
The solenoid plunger pulls the vent valve down, blocking off the passage to the charcoal canister.
电磁柱塞拉下通气阀， 堵住通向活性碳罐的通路。
The solenoid plunger pulls the vent valve down, blocking off the passage to the charcoal canister .
卸压阀或通气阀使罐内油面上方的蒸汽保持微正压(油罐正在排空时除外)。
Relief valve or vent valves permit a small pressure to be maintained on the vapor over the oil in the tank (except when the tank is being emptied).
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