Making traditional fabric yo-yos by hand is a time-consuming process: you cut circles from fabric, hand-baste around their edges, and then gather them into... J Stern - 《Threads》 被引量: 0发表: 2008年 Helical hooping bending making machine The utility model discloses a helical hoop ben...
Making traditional fabric yo-yos by hand is a time-consuming process: you cut circles from fabric, hand-baste around their edges, and then gather them into... J Stern - 《Threads》 被引量: 0发表: 2008年 Helical hooping bending making machine The utility model discloses a helical hoop ben...