Welding structure: racks, chassis, wheel box Plate into the factory (chemical composition analysis, mechanical properties test) — pretreatment — for sheet metal cutting-welding-seam UT or RT flaw — annealing treatment — roughing-finishing— vibration destressing—hot blasting —finishing 3945105508525939223-blid-3546868448224808021

เลขเด็ด"โค้งสุดท้ายอ.ธนากร"เลขเด็ด@ต้นหอมชุดเต็ม,แท้100%#1/6/62