多个半圆形凸起
multiple semi-cylindrical hill
多个含孔半圆形凸起
multiple semi-cylindrical hills with homocentric h
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
圆柱形半导体量子线
cylindrical semiconductor quantum wire
柱形凸起焊接
character-box reference edge
半圆形β摄谱仪
semicircular beta spectrograph