【建筑】钢梁（钢梁），横跨梁结构，方格天花板结构

ceiling, rib-span form

rib-span form, form;for coffered eilings

supporting, form for coffered ceilings (coffered ceiling boarding), rib-span form

rib reinforcement form for coffered ceilings, rib-span form

form for coffered ceilings, rib-span form

form for coffered ceilings (coffered ceiling boarding), rib-span form

rib-span form,

rib-span form (rib-span shuttering)