High enclosed grabs for: grain, wheat, feedstufffertilisercoalphosphateand many other materials1.It's suitable for port gate machine,bradge type unloading shipping machine. 2.Its capture proportion is 0.6-3.2t/m3 gor each kind of granularity bulk cargo. 3.The bulk cargo usually are grain,coal,cement,sulfur,mineral poweder,ore and so on.