shear seal valve 剪切密封阀
shear release seal assembly 剪切丢手密封装置
shear seal assembly 剪切密封总成
shear-seal type valve 平板遮盖阀
shear seal 剪力密封
dual shear seal 双剪切密封件
shear packing seal 剪切式密封
stratified shear seal system 层状剪切式密封系统
shear release seal assembly detail 剪切丢手密封装置
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