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| direct-reading pH meter | |||
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| direct reading meter | |||
| 直读 pH 计: 44 phrases in 14 subjects |
| Agriculture | 2 |
| Animal husbandry | 1 |
| Aviation | 1 |
| Chemistry | 2 |
| Drilling | 2 |
| Earth sciences | 1 |
| Electronics | 9 |
| General | 1 |
| Medical appliances | 1 |
| Metallurgy | 1 |
| Refrigeration | 2 |
| Space | 1 |
| Technology | 19 |
| Water resources | 1 |
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