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[单选题]
在铣削一种XY平面上的圆弧时,圆弧起点在(30,0),终点在(-30,0),圆弧圆心点坐标(0,-40),圆弧起点到终点的旋转方向为顺时针,则铣削圆弧的指令为()。
A.17G90G02X30.0Y0R50.0F50
B.17G90G02X30.0Y0R-50.0F50
C.17G90G02X-30.0Y0R50.0F50
D.17G90G02X-30.0Y0R-50.0F50
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.17G90G02X30.0Y0R50.0F50
B.17G90G02X30.0Y0R-50.0F50
C.17G90G02X-30.0Y0R50.0F50
D.17G90G02X-30.0Y0R-50.0F50
A.G17G90G03某-30.0Y0.R-50.0F50
B.G18G90G02某-30.0Y0.R50.0F50
C.G17G90G02某-30.0Y0.R-50.0F50
D.G18G90G02某30.0Y0.R50.0F50
A.G02X0Y80.I80.F300
B.G03X0Y80.I-80.F300
C.G02X0Y80.J80.F300
D.G03X0Y80.J-80.F300
A.平面布置应保证柱绑扎点在起重机工作半径圆弧上
B. 平面布置应保证柱脚中心在起重机工作半径圆弧上
C. 平面布置应保证基础杯中心在起重机工作半径圆弧上
D. 起吊时震动大
E. 生产效率高