An air force spokesman, P. r. Singha, says the trials will be conducted in different stages over one year.

空军发言人辛加说，这次试飞活动将在一年内分阶段进行。

youdao

An air force spokesman, P. r. Singha, says the trials will be conducted in different stages over one year.

空军发言人辛加说，这次试飞活动将在一年内分阶段进行。

youdao