id	keyword
fumecheng-6431	drilling
fumecheng-6431	feed
fumecheng-6431	feed rate
fumecheng-6431	friction
fumecheng-6431	tool
fumecheng-6431	friction drilling
fumecheng-6431	process
fumecheng-6431	fig
fumecheng-6431	control
fumecheng-6431	drilling process
fumecheng-6431	load
fumecheng-6431	drive
fumecheng-6431	torque
fumecheng-6431	cycle
fumecheng-6431	energy