Yonhap, the South Korean news agency, citing unnamed intelligence sources, said that the plane appeared to be a Soviet-era military jet and that the pilot might have been trying to defect.
韩联社，韩国的新闻通讯社，则援引匿名的情报来源说，这架飞机看上去属于前苏联时期的军用喷气战斗机，其飞行员可能尝试叛逃。
This paper develops a set of barycentre of plane automat Ed control system based on industrial personal computer and programmable logic controller aiming at the defect of avionics in our country.
针对目前我国机载航空电子设备特别是重心控制设备的落后现状，设计一套基于工业控制计算机和可编程逻辑控制器的飞机重心自动控制系统。
Method of calculation of defect site by ultrasonic inspection of indined plane welding has been described in detail, and formula have also been proved.
详细介绍了在斜面焊口超声波探伤中采用声程调节扫描比例进行缺陷定位的计算方法，并给出了计算公式。
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