动力驱动摆动式钉齿耙
reciprocating power-driven tine harrow
SJ-90振动摆度
SJ-90 vibration monitoring device
摆动磁针
horizontal vibrating needle
horizontal force instrument
vibrating needle
摆动从动件
Oscillating flat-bottomed follower
Swinging follower
oscillatory follower
oscillating follower