retractable undercarriage
stationary undercarriage
Steel Spring Undercarriage
undercarriage
起
行走
底盘
底
着陆装置
飞机起落架
起落架
车盘
行走部分
底架
支重台车
行走系统
行走机构
undercarriage arrangement
undercarriage component
undercarriage disassembly
undercarriage pin-on frame
undercarriage reconditioning
undercarriage reconditioning bulletin