floor live load roof live load 屋面活荷载 floor live load；roof live load 屋面活荷载 design vehicular live load (桥梁上)车辆实时载荷设计 .
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短语
楼面、屋面活荷载
floor live load
;
roof live load
;
characteriseic value of live load on floor or roof
楼面、屋面活荷载组
combination value of live load on floor or roof