Roller slewing bearing 1)ID:200mm-4000mm 2) High precision,long life 3) 20 years manufacturer 4) ISO9001:2000certificate ... /T,L/CApplicationmainly used in wind power equipment, construction machinery,oil drilling , metallurgy machinery,Mine , sailing and facilities for frontiers ... science.Packaging1,bearing Surface is covered with the anti-rust oil first,and then wrapped with the plastic film2,and ...