多个浅埋圆形孔洞
subsurface multiple circular cavities
浅埋圆形孔洞
subsurface circular cavity
带周期裂纹的圆形孔洞
circular hole with periodic straight cracks
浅埋洞室
shallow underground excavation
无底柱浅孔留矿法
Non-pillar Shallow Hole Shrinkage Method
local non-pillar mining method
刚性圆柱埋置基础
rigid cylindrical embedded foundation
半圆柱形边墩
semicircle cylindrical pier
半圆柱形反射器
semicylindrical reflector
semi-cylindrical reflector
半圆柱形量水槽
semi-cylinder measuring-flume