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在下游动阀罩下部连接有引鞋， 引鞋上开有导流通孔和导流槽。
The lower part of the lower traveling valve is connected to a guide shoe with diversion hole and diversion trench.
youdao
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在下游动阀罩下部连接有引鞋， 引鞋上开有导流通孔和导流槽。
The lower part of the lower traveling valve is connected to a guide shoe with diversion hole and diversion trench.
youdao