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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: 80 phrases in 19 subjects |
|
| English thesaurus | |||
| |||
| An airspace coordinating measure that uses altitude to separate users and as the transition between different airspace control elements (JP 3-52) | |||
| coordinating: 80 phrases in 19 subjects |