Eight-Cornered Truncated Pyramid – Full Overlapping Closure – Full Overlapping Closure C20.50.10.10 Eight-Cornered Truncated Pyramid – Full Overlapping Closure – Full Overlapping Closure C20.50.10.10 Production Team2021-05-18T21:58:43+08:00 ECMA C20.50.10.10 Eight-Cornered Truncated Pyramid - Full Overlapping Closure - Full Overlapping Closure