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seat
seat
最終更新: 2018-02-13
使用頻度: 65
品質:
a control stop for a flush valve for a urinal or toilet fixture includes a housing defining a flow chamber divided by a valve seat into inlet and outlet sections.
a control stop for a flush valve for a urinal or toilet fixture includes a housing defining a flow chamber divided by a valve seat into inlet and outlet sections.
the non-return valve should be opened to check for corrosion and also the condition of the valve seat; the valve should be tested in operation.
"topping-up" means the introduction of inert gas into a tank that is already in the inert condition, with the object of raising the tank pressure to prevent any ingress of air.