I purchased a large metal cutting saw from Unitech Machinery. The machine arrived no documentation (electric diagram or hydraulic diagram) at all. The Hydraulic pump did not work since the breaker did not function. It took 3 weeks to get a part from them after many e mails. The wires melted and again no response we finally received the electric and hydraulic plan but of course in Chineese. DO NOT BUY ANYTHING FROM CHINA ALL JUNK AS WE BY NOW KNOW. They cant even copy our product and screw it up.