1) mica undercuting saw
云母下刻锯
2) ridging
[英][ridʒ] [美][rɪdʒ]
云母下刻
3) mica-segment undercut
云母片下刻
4) mica undercutling tool
云母下刻刀
5) undercut mica
下刻的云母绝缘
6) mica undercutter
云母下刻机(换向器的)