推荐资源 1“ U-PVC阀SCH-80 0 0 整体阀HC-10 / 3 0 0 球阀 DN 15 - 1/2" 0 1 5/2 阀 4L210-08 (AirTAC) 0 0 截止阀 (asme b16.34) fl -150-2500 0 0