享誉我国机械行业30多年的大型工具书《机械设计手册》第四版于今年1月出版。 《机械设计手册》是新中国成立以来第一部采用国家标准,介绍国产材料和产品,反映中国自己的科技成果和生产建设经验,提供各 The large-scale reference book “Machinery Design Manual”, a large-scale reference book that has enjoyed a reputation of more than 30 years in China’s machinery industry, was published in January this year. The “Machinery Design Manual” is the first since the founding of new China adopted the national standard, introducing domestic materials and products, reflecting China’s own scientific and technological achievements and production and construction experience, providing