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material : 1301 phrase in 65 subjects |
| Accumulators | 1 |
| Agriculture | 69 |
| Antennas and waveguides | 4 |
| Brazil | 25 |
| Cables and cable production | 1 |
| Chemistry | 41 |
| Coal | 10 |
| Commerce | 4 |
| Communications | 11 |
| Construction | 22 |
| Cultural studies | 2 |
| Earth sciences | 48 |
| Economy | 33 |
| Education | 13 |
| Electrical engineering | 4 |
| Electronics | 48 |
| Energy industry | 7 |
| Environment | 96 |
| Finances | 13 |
| Food industry | 2 |
| Forestry | 3 |
| General | 134 |
| Health care | 24 |
| Hobbies and pastimes | 5 |
| Immigration and citizenship | 3 |
| Industry | 79 |
| Information technology | 13 |
| Insurance | 3 |
| International trade | 1 |
| Labor law | 5 |
| Law | 25 |
| Librarianship | 3 |
| Life sciences | 18 |
| Magnetics | 3 |
| Marketing | 10 |
| Materials science | 71 |
| Mathematics | 1 |
| Mechanic engineering | 22 |
| Medical | 40 |
| Metallurgy | 41 |
| Microsoft | 5 |
| Mineral products | 2 |
| Municipal planning | 2 |
| Natural resourses and wildlife conservation | 10 |
| Natural sciences | 32 |
| Nuclear and fusion power | 2 |
| Nuclear physics | 39 |
| Obsolete / dated | 3 |
| Patents | 92 |
| Pharmacy and pharmacology | 2 |
| Physical sciences | 1 |
| Piezoelectric crystals | 3 |
| Politics | 1 |
| Printed circuit boards | 2 |
| Radiology | 3 |
| Research and development | 4 |
| Semiconductors | 2 |
| Social science | 3 |
| Statistics | 6 |
| Technology | 16 |
| Telecommunications | 2 |
| Textile industry | 1 |
| Trade unions | 1 |
| Transport | 108 |
| Work flow | 1 |
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