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  • >> Inflatable Buoyancy Bags for Pipeline Laying
    Vertical mono buoyancy bags are design with one single point, special used for the pipeline laying work. Easier to operate than rubber air bags, and foam buoyancy units. Our mono buoyancy units are 6 times certificated by drop test. We can make 1ton ~ 5ton inflatable buoyancy bag...
  • >> A Frame Crane Proof Load Test
    A frame crane proof load test is one application of proof load bags. DOOWIN engineering team finished one A frame crane proof load test using 4 units proof load bags....
  • >> Crane Load Test Water Weight Bags
    Water filled proof load testing water weight bags - Water load test weights - water filled ballast, load test weight bags, load test water bags from DOOWIN....