R23
R23、R.23或R-23可以指：
- R23公路 (俄羅斯)
- R-23轉輪式機炮
- 警示性質標準詞列表R23：吸入有毒
- ICD-10 第十八章：症状、体征和临床与实验室异常所见R23 其他皮肤改变
| Q23 | ||
| R22 | R23 | R24 |
| S23 | ||
| R23 | - | 23R |
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