蜂窝式空心双向板
cellular voided two-way slab
钢筋混凝土双向板
two-way RC slab
two-way reinforced concrete slab
混凝土双向板
reinforced concrete two-way slab
concrete two-way slabs
平行圆管空心双向板
two-way voided slab with paralleled circle-tube
双向双从蹄式制动器
dual two trailing shoe brake
双向双领蹄式制动器
dual two leading shoe brake
双向双偏注入
Double crossed directions
双向双套冗余
BDR Bi – Duplexed Redundancy
BDR Bi C Duplexed Redundancy