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41. | gyrocompass course |
| 陀螺罗航向 |
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42. | gravity controlled gyro |
| 重力控制陀螺 |
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43. | gyro compass alignment |
| 陀螺罗经校准 |
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44. | gyrosyn compass |
| 陀螺同步罗盘 |
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45. | gyro compass system |
| 陀螺罗经系统 |
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46. | gyrocompass bearing |
| 陀螺罗方位 |
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47. | gyro erectional navigation |
| 陀螺光学导航系统 |
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48. | gyro-steering gear |
| 陀螺操舵装置 |
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49. | gyro pickoff angle |
| 陀螺传感角度 |
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50. | circle errors of gyroscope |
| 陀螺盘旋误差 |
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