大家在查： gear ratio Gebel Barkal and the Sites of the Napata gedanken experiment Geena Davis Geert Hofstede Gear train with fixed axes gear shaper gear set gear rack gear hobs

Gear transmission device

... 澄清 clarification 齿轮传动装置 gear transmission device 齿轮箱大齿轮端组成 gear box-big gear end composition ...