id	keyword
fumecheng-4951	excavator
fumecheng-4951	digging
fumecheng-4951	bearing
fumecheng-4951	resistance
fumecheng-4951	slewing
fumecheng-4951	drive
fumecheng-4951	platform
fumecheng-4951	position
fumecheng-4951	slewing platform
fumecheng-4951	mechanism
fumecheng-4951	bucket
fumecheng-4951	kinematic