shear seal valve 剪切密封阀

shear seal assembly 剪切密封总成

shear-seal type valve 平板遮盖阀

dual shear seal 双剪切密封件

stratified shear seal system 层状剪切式密封系统

shear release seal assembly 剪切丢手密封装置

shear packing seal 剪切式密封

seal shear 建立密封

shear release seal assembly detail 剪切丢手密封装置