back cavity中文什么意思
后腔
- back: n. 1.背,背部;背脊;背面,反面 ...
- cavity: n. 1.【解剖学】穴,窝,盂,腔, ...
- cavity back-up plate: 阴模托板
例句与用法
- ( 3 ) some destroy is likely to occur to existing tunnel before new construction , that is to say , the tunnel perhaps holds some flaw , therefore , a structure mechanics method is used in this thesis to analyze the safety of existing tunnel vvhich is under the condition of back cavity and insufficient thickness
( 3 ) 、在邻近隧道施工之前,既有隧道可能已经受到一定程度的破坏,既有隧道可能存在各种缺陷,通过结构力学计算,分析了有空洞存在或隧道衬砌结构厚度不够时隧道安全性。