B19
B19或B-19可以指：
- 近江舞子站的JR车站编号。
- B-19，硼的同位素之一
- 郑州快速公交B19路
- 细小病毒B19
- 卡罗-卡恩防御的ECO编号之一
| A19 | ||
| B18 | B19 | B20 |
| C19 | ||
| B19 | - | 19B |
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