The first two aircraft will be used for developmental purposes, and the next five after that will be used to train the first unit equipped, he said.
首批两架直升机将用于研发目的，并在未来五年用于培植测试机组配套设备。
The first two aircraft will be used for developmental purposes, and the next five after that will be used to train the first unit equipped, he said.
首批两架直升机将用于研发目的，并在未来五年用于培植测试机组配套设备。
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