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BriefTube and pipe flanges are so interconnected parts, connected to the pipe end. There are holes on the flange bolts so that the two flanges tightly connected.

BriefTube and pipe flanges are so interconnected parts, connected to the pipe end. There are holes on the flange bolts so that the two flanges tightly connected.

BriefTube and pipe flanges are so interconnected parts, connected to the pipe end. There are holes on the flange bolts so that the two flanges tightly connected.

BriefTube and pipe flanges are so interconnected parts, connected to the pipe end. There are holes on the flange bolts so that the two flanges tightly connected.