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| zero milestone (the point from which all road distances in a certain city or country should be measured denghu) | |||
| prime principial, zero meridian; circle of origin; principial meridian (MichaelBurov) | |||
| primary meridian | |||
| zero meridian | |||
| principal meridian; initial meridian | |||
| basis meridian | |||
| first meridian | |||
| meridian of Greenwich | |||
| first meridian (prime, principal, zero) | |||
| Greenwich meridian | |||
| meridian of origin; null meridian; reference meridian; standard meridian | |||
| prime meridian | |||
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| first meridian; principal meridian; zero meridian | |||
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| 0 meridian | |||
| prime meridian | |||
| нулевой меридиан: 1 phrase in 1 subject |
| Astronautics | 1 |