解放前,我国是一个半封建半殖民地的国家,几乎没有自己的机械制造业,科学技术十分落后,因此大学教材也多是搬用或抄袭英美的,机械制图的教材当然也不例外,就是偶而有一两册机械制图的书籍出版,其制图标准当然也是沿用国外的。 解放后,在毛主席革命路线指引下,我国机械制造和科学技术有了飞跃的发展,因此,不仅发行了大量的机械制图教本和有关书籍,而且也制订了自己的机械制图标准。 Before the liberation, our country was a semi-feudal and semi-colonial country with almost no own machinery manufacturing and science and technology is very backward, so the university textbooks are mostly moving or plagiarism Britain and the United States, of course, mechanical drawing of course is no exception, that is, occasionally one or two Book mechanical drawing books published, of course, its drawing standards are also used abroad. After the liberation, under the guidance of Chairman Mao’s revolutionary line, our country’s machinery manufacturing and science and technology have made leaps and bounds. Therefore, not only the large number of mechanical drawing books and related books have been issued, but also their own standards of mechanical drawing have also been formulated.