... own factory.The low price with the goods can be supplied, good quality, the standard drilling rig in China. It is No.1 ... a best quotation.A, What is the working pressure ( Mpa, Bar, PSI)?B, What is the volume flow ( m3/min, CFM)?3, What is the Power supply ( KW, ... add to the cost for the consumers; meanwhile, the time cost and the loss caused by returning will far exceed the value of the product itself, ...