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| 拉希环［开口圆筒形圈;其直径和长相等］ | |||
| 拉希格填充瓷圈 | |||
| 拉西环 | |||
| 拉西环〈蒸馏〉 | |||
| 拉歇环; 填充圈 | |||
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| 拉西环 | |||
| 拉希环; 填充瓷圈 | |||
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Raschig ring : 2 phrases in 2 subjects |
| Electronics | 1 |
| Technology | 1 |
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