The reason is a unique bronze gatewedge that's shaped like a block instead of round like all other gates.
原因在于这种独特的青铜闸阀楔板形状上如同方形阻断闸门，而不象其它类型的闸阀。
2
Gate and globe valves are available with a selection of wedge or disc and body configurations for different services.
闸阀和截止阀具有各种楔形闸板或阀瓣和阀体的配置，适用于不同的应用场合。
3
Gate has two sealing surfaces, the most commonly used wedgegate valve sealing surface to form two wedge-shaped, wedge Angle parameters vary with the valve.