Ⅱcross-section main girder

Student’s consciousness of main body

stay clear of the enemy's main force and

Spine Main Girder

ship’s main dimensions

shape’s main orientation

retractable main girder

repair to main girder

railway transportation’s main business

pre-raising height for monitoring the main girder

people’s main body position

optimization choice of main girder chord member

main transverse watertight bulkhead

main transverse frame

main transverse bulkhead

main transverse beam