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| English thesaurus | |||
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| An airspace coordinating measure that uses altitude to separate users and as the transition between different airspace control elements (JP 3-52) | |||
| coordinating: 21 phrases in 6 subjects |
| Construction | 11 |
| Earth sciences | 1 |
| General | 5 |
| International trade | 1 |
| Obsolete / dated | 2 |
| Politics | 1 |