TMA = Theoretical Mechanical Advantage = 理论机械效率
PMA = Practical Mechanical Advantage = 实际机械效率
更多内容请访问走天涯官网 https://www.zoutianya.com/outdoor-book/
TMA = Theoretical Mechanical Advantage = 理论机械效率
PMA = Practical Mechanical Advantage = 实际机械效率
更多内容请访问走天涯官网 https://www.zoutianya.com/outdoor-book/