Introduction of ZM-70 7.5ton Crawler Excavator Machine 1. ZM-70 7.5ton Crawler Excavator Machine designed with mature hydraulic system, Easy to operate. High working efficiency. Main hydraulic parts are imported from Korea, Japan. Stable working performance. 2. Structural parts are all made by our company; main parts are all under nondestructive inspection treatment, which ensure the parts strength and stiffness. Main structural parts are treated by shot blasting, which increase the adhesion of painting, prevent from corrosion, and finally prolong the service time of the excavator.