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| -check (periodic inspections that have to be done on all commercial/civil aircraft after a certain amount of time in use, as in "time to conduct D-ch; в период его эксплуатации Val_Ships) | |||
| backyard (в период его эксплуатации; periodic maintenance inspections (A,B,C and D-checks) that have to be done on all commercial/civil aircraft after a certain amount of time in use: time to conduct D-check Val_Ships) | |||