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根据交通部公路局和科技局的要求,由部公路研究所主持,江苏沐阳公路仪器厂、江苏省交通厅工程管理局、江苏泗阳橡胶厂和四川、云南、广东、北京等省(市)公路局(处)等共同协作,参照国外资料研制出JM-1型石料磨光机对国内十一省(市)的300余种石料和马达加斯加的6种石料测定了石料磨光值选定了标准石料,并进行了
According to the requirements of the Ministry of Transportation Highway Bureau and the Bureau of Science and Technology, the Ministry of Highway Research Institute, Jiangsu Muyang Road Instrument Factory, Jiangsu Provincial Department of Communications Engineering Authority, Jiangsu Siyang Rubber Factory and Sichuan, Yunnan, Guangdong, Beijing and other provinces ) Highway Bureau (Branch) and other joint work, with reference to foreign information developed JM-1-type stone grinder on the domestic 11 provinces (municipalities) of more than 300 kinds of stone and Madagascar, six kinds of stone measured the value of the stone polished value The standard stone, and carried out