空心村改造
hollow village reconstruction
220kV空心瓷绝缘子
220kV porcelain hollow insulator body
SiO2空心微球
Hollow silica microsphere
Silica hollow microspheres
半空心铝型材
half hollow aluminium profile
半圆空心加强材
falf round stiffener with hollow core
扁平头半空心铆钉
thin flat head socket shank rivet
变截面空心薄壁墩
Nonuniform Thin-walled Hollow Pier
变截面空心薄壁高墩
variable section thin-walled high piers
薄壁空心墩
thin-walled hollow pier
thin walled hollow pier
Hollow-thin pier
hollow pier with thin wall
thin-walled
hollow pier