1) Back
[英][bæk] [美][bæk]
朝后;向后;背部;后9洞，"走后门"推杆(球从球洞后沿进洞)
3) back cavity
背后空洞
1.
Ground penetrating radar is a kind of economical and high efficient detection tools in geotechnical engineering and can detect the thickness of sprayed concrete for initial lining,back cavity and compacting status of backfilling for overbreak in tunnel.
探地雷达是岩土工程检测中较为经济、高效的检测工具之一,可以对初衬喷射混凝土的厚度、背后空洞及超挖回填密实情况进行探测。
4) Back door
"走后门"推杆
5) Houdidong
后底洞
1.
The geological features of the Houdidong Au deposit, Longjing, Jilin province and its train of thought for ore prospecting;
吉林省龙井市后底洞金矿床地质特征及找矿思路
补充资料：背后
①后面：山～。②不当面：有话当面说，不要～乱说。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条