半挂车前回转半径
rear tractor clearance radius of semi-trailer
front fitting radius of semi trailer
前支腿传感器控制阀
front leg sensor control valve
前支腿改型工具组
front leg modification kit
前支腿提升控制
front leg elevation control
前支腿提升控制阀
front leg elevation control valve
前支腿提升油缸
front leg elevation cylinder
L4、5神经前支
anterior branches of lumbar nerves 4
5