ロックファイバーでしょう
rokkufaibādeshō
1. Probably rock fiber.; Likely rock fiber.
Noun
1. Probably rock fiber.; Likely rock fiber.
1. lock
2. lock (in rugby); lock forward
1. rock (music)
2. rock; boulder
3. on the rocks (drink)
1. automatic lock
2. automatic door-locking system
1. hard rock
1. fiber; fibre
1. glass fiber; glass fibre
1. rock wool; mineral wool
1. Little Rock
1. it seems; I think
2. right?; don't you agree?