自航开底泥驳
self-propelled split dump barge
板底压浆
cement grout injected under slab
板底弯沉
deflection beneath old concrete slab
板底脱空注浆
grouting treatment for void beneath slab
板底脱空
void underneath pavement slab
slab suspending
slab hollow
void beneath concrete slab
cavity of slab
cavity beneath slab
void beneath slab
Hole under Concrete Pavement
void at the bottom of slab
gapping under pavement slab
empty space beneath the slab
void under slab
Bursted bottom plate
Cavity beneath road slabs
Void beneath Cement Concrete
plat-bottom escape
hollow board
板底滑道
Pole-slide with plank-bottom
摆动斜底从动件盘状凸轮机构
disk typed cam mechanism with swinging oblique bot
disk typed cam mechanism with swinging oblique bottomed follower