... sidewall welding machine 1)double side sealing 2)high frequency welding 3)ISO9001:2008 and CE 4)fine workmanship,reliable sidewall welding ... machineDescirption this high frequency machine is suitable for these material like ... gas mattress,boat,life jacket,toy,stationery,raincoat,plastic cover,purse handbag,leather strap,album and CD diso ...