Method Questionnaires were carried out among 1 924 military pilots, including pilots of primary trainer, attacker, fighter, bomber, transporter and helicopter.
方法对1 924名军机飞行员进行问卷调查，涉及初教机、强击机、歼击机、轰炸机、运输机及直升机飞行员。
US Army New Training Helicopter(NTH)is a non-developmental item commercial helicopter which is to replace Bell UH-1H as an initial en- try rotary wing and primary instrument trainer.
美国陆军新型教练直升机是一个非新研项目的批量生产直升机，用以取代初级训练及 仪表 飞行训练用的贝尔 UH-1H。
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