Outside screw stem stop valve的意思|示意
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外螺纹阀杆截止阀
Outside screw stem stop valve的网络常见释义
上螺纹阀杆截止阀 ... 内螺纹青铜截止阀 female screw bronze stop valve 下螺纹阀杆截止阀 Inside screw stem stop valve 上螺纹阀杆截止阀 Outside screw stem stop valve ...