Lang Fang Sheng Da Drip Irrigation Equipment Co. Ltd. was established and progressed in creating the inner flat dripper pipe production line--the WDG series in 1997. This machine has a unique design, which meets international standards and has been awarded more than ten national patents.

The WDG series started with the WDG I series then moving onto the second, third and fourth series. At present, the technology used in this production line has reached international advanced level, some of the technologies are in the leading position of the world......