... packing coefficient ==> 密实系数 packing collar ==> 垫圈 packing compact ==> 装模 ...
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leather packing collar 皮封圈 ; 皮垫圈
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Since the gas bag is added, the pressure increase within the hydraulic chamber is very slight when the string collar passes through the packing element.
由于增加了气囊，管柱接箍通过胶筒时，液压腔内的压力升高很少。
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