PVC Connection Pipe,Pvc Hose Pipe,Pvc Layflat Hose,Pvc Suction Hose, PVC Garden Hose Yuyao Gaobao Sanitary Ware Factory , https://www.gurberry.com Our factory processes a liquid distribution plate with 14 φ30_0~(+0.52)mm holes in a plane of 298×210mm. Each hole has a φ33.4_0~(+0.1)mm and a width of 5±O. The 25mm ring groove has been previously processed on a lathe with a four-jaw chuck, which is very inefficient. To this end, we designed and produced a bevel drive internal hole grooving tool (see photo), which was modified on the drill bed and used very well.