Double pipe glue gun use: first, to suppress the back-end with a thumb ring, the subsequent pulling of the wire with a curved hook, pull as far as possible in place, first put the glass plastic head (with mouth other end), so that the nozzle front part exposed , then the entire branch rubber plug in, relax the thumb part, then squeeze him!
  Glass glue gun on the market today, there are three, one for the air pressure glue gun, air compressor pressure will need to glue pressed out, another kind of glue guns for the whole closed AB glue designed to fight the use of glue guns to facilitate product mix even to reach the best performance products. The market is more common semi-closed plastic gun (pictured).

      Usage: First press and hold the back end with a thumb ring, later pulling the wire with a curved hook, pull as far as possible in place, first put the glass plastic head (with mouth other end), so exposed in front of the nozzle part, and then the whole Support rubber plugs in, relax the thumb part, then squeeze him!