短語(yǔ)詞組短語(yǔ)back k strength 背力back -fill strength 充填體強(qiáng)度Back -part strength test 靠背強(qiáng)度測(cè)試back strength test -static-type II &III 靠背靜態(tài)強(qiáng)度測(cè)Back strength test -static-type I 靠背靜態(tài)強(qiáng)度測(cè)strength of back flow 回流強(qiáng)度FEM back -analysis from instability-strength degradation 有限元失穩(wěn) 返回 back strength