In view of problem of unsatisfactory effect of traditional training for coal mine full-hydraulic drilling rig. a training system for coal mine full-hydraulic drilling rig based on virtual reality technology was developed. The system is consisted of lower computer and upper computer. and communication between the lower computer and the upper computer is realized through FX2N series PLC... https://dgbkobnyuusvgf.nizarblog.com/35079401/keepers-of-law-and-order-x-outlaws-police-brutality-torture-and-execution-in-elite-squad