坐标轴系 meaning in English

coordinate axes
frame of axes
system of axis
system of coordinates

Flight mechanics - concepts , quantities and symbols - axis systems and motion state variables
坐标轴系和运动状态变量
Aerodynamics - concepts , quantities and symbols - axis systems and aircraft motion state quantities
坐标轴系和飞行器运动状态量
Flight mechanics . concepts , quantities and symbols axis systems and motion state variables
飞行力学概念量和符号坐标轴系和运动状态变量
Aerodynamics - concepts , quantities and symbols . part 2 axis systems and aircraft motion state quantities
空气动力学概念量和符号第2部分坐标轴系和飞行器运动状态量