マルチレベル潜水 だろう
maruchireberusensuidarō
1. Probably multi-level diving.
Noun
1. Probably multi-level diving.
1. multi-
2. multi-post
3. multi-level marketing; pyramid selling
1. high-level
1. multinational
1. submarine
1. diving; submerging
1. garden pond; miniature lake
2. fountain
1. nuclear submarine
1. seems; I think
2. right?; don't you agree?