- 主: host
- 纵: release; set free; let go
- 梁: beam
- 纵梁: carline =carling; fore and aft beam; fore-and-aft beam; girder longitudinal; longerons; longitudinal beam; longitudinal girder; longitudinally disposed beam; side rail; spar; stringer; stringpiece; tree
- 主纵轴: principal longitudinal axis
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