ロックウールです
rokkūurudesu
1. Rock wool.
★ Common
Noun
#765310
1. Rock wool.
1. lock
2. lock (in rugby); lock forward
1. rock (music)
2. rock; boulder
3. on the rocks (drink)
1. wool
1. automatic lock
2. automatic door-locking system
1. to loiter; to hang around
1. hard rock
1. Little Rock
1. rock wool; mineral wool
1. Lock's; Of lock