平行直线间区域
area between parallel lines
平直飞行
straight and level fiighl
曲线直线化
approximate nonlinear method
同心圆平行直线剖分
Partition of Concentric Circles and Parallel Lines
一路一线直行式
one route one line and run straight mode
永磁直线直流无刷电动机
linear permanent magnet brushless DC motor
直线行排列
Straight line arrangement
直线行驶
straight travel
straight line travel
straight driving
travelling as straight-line