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| Chinese | English |
| 三相五线制 | 3-phase 5-wire system |
| 五极隔离开关 | five-pole isolator |
| 五级涌浪 | long moderate swell |
| 五级风 | wind of Beaufort force 5 |
| 五级风 | fresh breeze |
| 五级风浪 | very rough sea |
| 五金配件 | hardware fitting |
| 五防 | five preventions prevention of closing or opening of disconnectors with load, prevention of accidental closing or opening of circuit breakers, prevention of closing of earthing switch to live parts, prevention of connection of live parts to earth, prevention of access to live bay |
| 五防装置 | fail safe interlock |
| 四舍五人 | round-off |