钢筋混凝土双向受弯梁
reinforced concrete bi-flexural beam
双向受力板
bi-directional pressured plate
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
双向双通道变通径挤压
dual-directional extrusion