INSTRUMENTS, SIMULATED, AIRCRAFT TRAINING DEVICES; DIRECTIONAL GYRO (NO S/S DOCUMENT)
模拟仪器、飞机训练设备；定向陀螺仪（无S/S文件）

1984-11-07

INSTRUMENTS, SIMULATED, AIRCRAFT TRAINING DEVICES; GYRO ALTITUDE (NO S/S DOCUMENT)
仪器、模拟、飞机训练设备；陀螺高度（无S/S文件）

1986-11-07

INSTRUMENTS, SIMULATED, AIRCRAFT TRAINING DEVICES; GYRO ATTITUDE (NO S/S DOCUMENT)
仪器、模拟、飞机训练设备；陀螺姿态（无S/S文件）

1969-04-04