单词 | ball valve |
释义 | ball valvenoun 1A one-way valve that is opened and closed by pressure on a ball which fits into a cup-shaped opening.Then we open the ball valve, sending the full force of the water uphill to the adjoining vegetable field....
1.1British another term for ballcock.Until whatever distant date in the future my landlord comes back, you have to stick your hand down in the tank and lift the flapper ball valve yourself....
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