... 3.Advanced equipments and infrastructure Leakproof grab1.The leakless grab uses two forms generally leakage-proof structures, one kind ... The leakless grab usually must be according to the hoist crane characteristic, the grab characteristic dispose. The double scoop grab generally may ... used in power plants,goods yeard,workshop,wharf to grab loosematerial, rubbish, scrap iron,etc.NOTE:please show ...