Overview: The JR-19A type winding and torsion testing machine was designed by our technical personnel under the guidance of relevant experts from the Shanghai Electric Power Research Institute to merge and modify the J-19 wire winding testing machine and the GX-3 type torsion testing machine. It can meet the teaching requirements of the original R-19 type winding testing machine and the GX-3 type torsion testing machine, and meet the standards of GB4909.4-2009 "Class Wire Testing Method Torsion Test" and GB4909.7-2009 "Bare Wire Testing Method - Winding Test" Used for occasions where silver wire, steel wire, and copper rod require winding and torsion tests. It is a necessary testing tool for steel core aluminum stranded wire manufacturers to achieve multi-purpose and reduce investment. Replace GBT4909.4-1985 and GB/T4909.7-1985.