| 項目 |
英語 |
| NAS電池 | sodium sulpher battery |
| NBS法効率 | dust spot efficiency by National Bureau of Standards |
| NC曲線 | noise criteria curve |
| NEC | National Electrical Code |
| NEMA | National Electrical Manufacturers Association |
| NFPA | National Fire Protection Association |
| NOx | nitrogen oxide |
| NPSH | net positive suction head |
| NTSC方式 | national television system commitee system |