... is main to produce DHL,UPS,EMS express mailer. At China Market ,95% EMS, DHL and UPS envelope factory use our machine express mailer ... develops EMS ,DHL,UPS express envelope making machine that can fold, glue, sealing double-sided tape and integrated easy-to-tear glue ... PCS to 6,000 PCS. So far, it has been adopted by around a dozen professional EMS ,DHL,UPS envelope manufacturers DHL express mailer ...