Hangzhou DERUIBAO Pipline Technology Co., Ltd. is located in Hangzhou,China. We are specialized in various series of manual butt welding fusion machine (rack driving,rack and pinion driving,hand push driving),hydraulic welding fusion machine,electrical welding fusion machine and HDPE pipe fitting. We use German technologies and established a R&D team of senior electrical engineers to manufacture products in strict accordance with German electrical industry standards, especially GB4706.1-1998 ...