DN 机集直角咬口、拼接、圆咬口多种功能于一机SLJ机是直角咬口和圆咬口为主，供小型工程单位按需选购。 DN machine collects multiple functions such right angle seam, joint, circular together. SLJ machine take right angle and circular seam as its main roles, offering small scale project units to buy according to their requirements.
