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HYDRAULIC MAKE-UP/BREAK-OUT TONG Hydraulic make-up/break-out units is a king of machine for making up and breaking out thread joint,which is suitable for the assembly and disassembly of downhole pump, downhole tools, tubing ,sucker rod, casing and other thread joint tools. This product has following features: Unit's head and backup tong clips or loosens simultaneously. Unit's head and backup tong have four planetary claws with bi-direction mechanism . Don't change an part in application range.