联合起草示例。如果你比我速度更快,请联系我。附上起草过程的视频。
https://3dwarehouse.sketchup.com/model/31ad052d-de85-4977-b441-992cc20abeba/joint-3-imaicom
https://www.youtube.com/watch?v=KAO8WIOGTOo
https://denshiman.com/10mm_square_pipe.html