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Mechanical Single Rope Touch Open Grab Single Rope Touch Open Bulk Grab is an efficient tool for loading and unloading sands, coal, mineral powder and bulk chemical fertilizer. The mechanical structure for opening & closing is simple and original. It is easy to use and especially works for the crane which has one hoisting drum. Single rope grab Work Principles: Close: When the grab need to close, just put the opened grab on the materials, the put down the crane hook till the