Single rope grabs do not rely on the external sources of energy.With the going up and down of the single rope the grab can automatically be opened or closed. The unique jaw curved structure is particularly beneficial to the loading or unloading of sand,coal. 
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Ella/Product dept.China Fabe Heavy Industry LimitedTel :+86 021-35327832Fax:+86 021-35327839Mob:+8615000089906Email:Ella(AT)fabegroup.comhttp://www.fabegroup. com