sterile access valve 无菌进入阀 ; 不育访问阀 ; 无菌访问阀
drain valve access 排出阀检查口
drain valve access cover 排泄阀检视盖
relief valve access plate 安全阀检视板
supply valve access cover 供油阀检视盖
relief valve access cover 安全阀检视盖
crankcase drain valve access cover 曲轴箱排油阀检视孔盖
Extension Assembly in precut lengths. Use exiting valve top Access Plug.
预先切割长度的加长组件总成。采用现存阀门顶部进入塞。
Forward needle valve positions for easy access.
针形阀位置提前，便于接近。
A valve installed in the wellhead assembly to provide access to the casing annulus of non-producing casings.
安装在井口装置中的一个阀。它提供通向非生产套管的套管环形空间的通路。
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