这是一首没有谱曲的“歌词”。权当是制图课的“小九九”或顺口溜也无妨。这是李如敬老师根据劳动版《机械制图》中等职业技术教材内容,结合自己多年教学实践的归纳和总结,很方便记忆和掌握,对《机械制图》教学中的师生,尤其是对初学制图者有一定的帮助和参考价值。———编者 This is a song without lyrics “Lyrics ”. When the right is a charting class “little ninety-nine” or jingle nothing wrong. This is Li Rujing teacher according to the labor version of “Mechanical Drawing” content of secondary vocational and technical teaching materials, combined with their many years of teaching practice induction and summary, it is easy to remember and grasp the “mechanical drawing” teaching teachers and students, especially for beginner cartographers Have some help and reference value. ---editor