... 3834-3, ISO9001:2008 3.Ten years experience of welding manufacture. welding frame seat-back for bus AL-0089 welding bus ... :according to drawins and samples Meterial: Steel, stainless steel, carbon steel, aluminum, zinc, brass, plastic etc. Making process: ... : ISO9000:2008 , EN15085-2, ISO3834-3 High technique of welding, stamping, bending, coating, injection moldingCompany profile Aolin ...