scarifier
/ˈskeərɪfaɪə(r)/noun
1- a tool with spikes or prongs used for breaking up matted vegetation in the surface of a lawn草皮翻挖机。
1.1
- a machine with spikes used for breaking up the surface of a road（路面）翻掘机。
1.2
- chiefly Austral. a machine with spikes or prongs used for loosening soil〈主澳〉松土用农机具。