 |
| |||
| cyclometer; period meter | |||
| periodic table | |||
| periodic chart | |||
| periodical chart; periodical table | |||
| |||
| periodic table | |||
| 周 期 表: 30 phrases in 15 subjects |
| Agriculture | 2 |
| Automobiles | 1 |
| Aviation | 1 |
| Business | 1 |
| Chemistry | 1 |
| Dermatology | 1 |
| Desert science | 1 |
| Drilling | 1 |
| Electronics | 3 |
| Metallurgy | 3 |
| Nautical | 1 |
| Oil / petroleum | 5 |
| Physics | 1 |
| Technology | 7 |
| Telecommunications | 1 |
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