high frequency welding machine with double head 1)double station 2) ... leather and cloth etc. main applicationhigh frequency plastic packagingincluding heat sealing and trimming for upper ... mattress,boat,life jacket,toy,stationery,raincoat,plastic cover,purse handbag,leather strap,album and ... provision of nations “radio interference committee"(CISPR) with steady frequency device and prevent the leak of ...