| English | Japanese |
| n closed loop | 無限ループ (mugen-rūpu) |
| closed loop control | 閉ループ制御 (hei-rūpu-seigyo) |
| closed loop method | クローズドループ方式 |
| closed-loop control | 閉ループ制御 (hei-rūpu-seigyo) |
| n closed-loop hot springs bath | 循環風呂 |
| loop closed | ループ閉鎖 |
| semi-closed loop method | セミクローズド・ループ方式 |