“六五清砂”是我国铸造行业清砂技术的一项重大技术革命。毛主席说:“世间一切事物中,人是第一个可宝贵的。在共产党领导下,只要有了人,什么人间奇迹也可以造出来。”在短短的一年多的时间里,“六五清砂”在全国遍地开花结果。这是党和毛主席对于工人阶级关怀备至的体现,是社会主义制度优越性的体现。在举国上下,一片 “Six-five clear sand” is China’s foundry industry sand technology a major technological revolution. Chairman Mao said: “In all things in the world, man is the first one to be precious. Under the leadership of the Communist Party, miracles can be created as long as there are people.” In just over a year’s time,六五 清 砂 "flowered throughout the country. This is an embodiment of the party and Chairman Mao’s care for the working class and an embodiment of the superiority of the socialist system. In the whole country, one