Shandong Wantong hydraulic Co.,ltd, sets up in 2004, is a specialized hydraulic cylinder manufacturing enterprise which takes up with design, R&D,and manufacture os hydraulic cylinder. The main products are dumper truck telescopic cylinder, coal mine machinery hydraulic cylinder, ocean engineering hydraulic cylinder, petroleum equipments hydraulic cylinder, etc, including over 120 kinds. Now it has been the largest manufacturing base of hydraulic cylinder in Shandong provice.