... and it is still working well now. 2, First D type compressor in China made by Tongda in 2002, 3, First XD ... made by Tongda in 2002, 4, First HY(hydrostatic CNG compressor) type daughter compressor in China made by Tongda in 2004, 5, More ... equipment including Gas Regulating system, cylinder for station, Cooling System, compressor, PLC Control Cabinet, Priority Panel, gas dryer, Exhaust Gas Reclaim ...