四川省自贡大安农机修造厂在川——40型机动打眼机的基础上,经过反复试验改进,试制成功了川—76型伸缩式改土钴。通过现场使用,深受贫下中农的好评,于1976年上半年正式定型,投入批量生产,有力地支援了农田基本建设。 Zigong Daan Agricultural Machinery Repair Factory in Sichuan Province has successfully improved Chuan-76 retractable earth-improving cobalt on the basis of the Chuan-40 motorized drill machine. Through the use of the site, it was well received by the poor and middle-aged farmers. It was formally established in the first half of 1976 and put into mass production, effectively supporting the farmland infrastructure.