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midheaven | |||
longitude circle; meridian circle | |||
meridian; observer's meridian; principal vertical circle; transit meridian; longitude line |
子午圈 : 50 phrases in 10 subjects |
Agriculture | 1 |
Astronomy | 1 |
Aviation | 3 |
Drilling | 1 |
Earth sciences | 2 |
Electronics | 1 |
General | 2 |
Oil / petroleum | 3 |
Space | 6 |
Technology | 30 |