怎么修改cnc程序里的坐標系？

cnc編程中工件坐標系G54~G59是機床定位的功能,在一單節程序里只能用一個坐標,比如(G0G90G54X50Y50S1386M3.)要換為G55。（G0G90G55X50Y50S1386M3）一個坐標只能定位一個數據，O006G09G0G54X0Y0S1500M3；G43H1Z50.M8；Z1.G1Z0F500X50Y-50F2500.X0Y-50....Z50M5M9G91G28Z0.T2M6G0G90G55X0Y0S2000M3;G43H2Z50.Z1.G1Z0F500X50Y-50F2500.X0Y-50.