板底脱空
hollow board
slab hollow
void under slab
cavity of slab
void beneath slab
void beneath concrete slab
cavity beneath slab
void underneath pavement slab
void at the bottom of slab
empty space beneath the slab
Cavity beneath road slabs
slab suspending
Void beneath Cement Concrete
gapping under pavement slab
Bursted bottom plate
Hole under Concrete Pavement
plat-bottom escape
脱空薄板
thin plate over hollow base
水泥混凝土路面地基脱空识别
identifying foundation void of cement concrete pav
桥头搭板底脱空
bottom disjoint of approach slap
面板脱空
void of face slab
disengaging of face slab
Separation between concrete slab and cushion layer
dislocation of the slab face
face slab separated from dam body
interspace between slab and cushion layer