Qingdao Doowin Rubber and Plastic Co., Ltd. is a leading manufacturer of underwater air lifting bags, proof load testing water weight bags, lifeboat & Davit test water bags, salvage tubes & Pontoons,
pipeline buoyancy bags, pipe plugs, ship launching marine rubber airbags, pneumatic rubber fenders, offshore buoys, foam-filled fenders, liquid storage pillow tanks, and other products made of heavy-duty PVC or TPU coating fabric. We also provide crane load testing service, and rental airlift bags and water-filled weight bags. DOOWIN underwater air lift bags include parachute type lifting bags and totally enclosed type lifting bags. The parachute type lifting bags have open bottom type air li
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