... NdFeB 3.patent:patent product 4.usage:metallurgy,mining,electric power,chemicals,etc 1. OVERVIEW OF PERMANENT MAGNETIC LIFTERJQYD series permanent ... is only restricted in the attracting of small tonnage and plane materials, (attraction of plates and pieces is≤5000Kg); Another ... , such as1. High energy consuming,2. In need of power failure protection,3. Magnetic hysteresis,4. Small unit area attraction ...