... clean-out door 清洗排放闸门 clean-out valve 清洗排放闸 cleaner 净化器，除渣器 ...
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The needle valve can be closed through the rotation of a needle stem, and the oil cleaning device can also be driven to lift to clean out carbon deposit in the nozzle.
通过针阀杆的旋转即可以关闭针阀 又可以带动清油器升降，清除喷嘴中的积碳。
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