物质在实用点与输送空气分离，然后通过蝶阀或滑动闸门阀分批排出，或者通过旋转气闸阀门持续排出。
Material is separated from the conveying air at the use point, then discharged on a batch basis via butterfly or slide gate valves, or continuously via rotary airlock valves.
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。
The reason is a unique bronze gate wedge that's shaped like a block instead of round like all other gates.
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