hollow cylinder
空心圆筒体
空心圆柱体
空心圆柱
空心柱体
空心圆筒
中空圆柱
圆柱壳体
空心园筒
滚刀筒
孔道试样
圆环
管状材料
圆筒
hollow cylinder apparatus
hollow cylinder intact sample
rectangular hollow block
rectangular hollow columns with openings
Rectangular Hollow Pier
rectangular hollow piers
Rectangular Hollow Section
square and rectangular hollow sections
thick tube hollow cylinder
thick-wall steel tube with square and rectangular hollow section
thick-walled cold formed steel with rectangular hollow section
cylindrical rubber fender
Hollow gravity dam with an arch in the hollow
hollow with an arch in the hollow
neoprene rubber chloroprene rubber