Decades: 20s 30s 40s 50s 60s - 70s - 80s 90s 100s 110s 120s
Years: 68 69 70 71 72 - 73 - 74 75 76 77 78
Deaths
... (Compare with graphic below.) Since this friction force is essential for the device's operation, the groove must not be lubricated. The acceleration of the gyroscope ...