?机舱执照
... engine knock 发动机爆震 engine licence 机舱执照 engine licenser 主机执照签发者 ...
单发动机许可证
Dave Rawlins achieved the 45 hours single-engine flying time needed to win a private pilots licence at the beginning of 2012.
BBC: Buzz Aldrin bids to help people with disabilities to fly
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。