在毛主席革命路线指引下,山东掖县材料试验机厂与长春材料试验机研究所的工人和干部在上级党委的正确领导和兄弟单位的大力支持下,共同设计试制成功 HB9—3000型自动布氏硬度计,经过国家有关部门的鉴定证实达到 Under the guidance of Chairman Mao’s revolutionary line, the workers and cadres of Shandong Yuxian Material Testing Machine Factory and Changchun Material Testing Machine Research Institute, together with the correct leadership of the higher Party committees and the strong support of their brother units, jointly designed and manufactured HB9-3000 Automatic Brinell Hardness, through the identification of the relevant departments of the country confirmed