摆撞硬度 pendulum hardness

摆撞硬度试验 pendulum hardness test

加硬防撞杆 Extra Stiff Sway Bars

摆撞硬度试验机 pendulum hardness tester

冲撞硬度 dynamic hardness

硬球碰撞 hard sphere collision ; collision hard-sphere

硬碰撞 hard collision