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我国工人阶级和铸造工作者首创的七○砂新工艺,已在全国各地普遍推广应用,并取得了很大成绩,得到了广大工人师傅的大力支持和欢迎。但是七○砂应用的时间还不长,难免会有某些不完善之处。许多大型、重型厂铸钢车间师傅反映,七○砂铸型浇注后,有时出现头晕、恶心、甚至昏倒等症状。天津重机厂和其它兄弟单位都出现过这种现象。这是直接关系到工人师傅的劳动条件和身体健康的问题,
The new technology of “70 sand”, pioneered by the working class and foundry workers in our country, has been widely popularized and applied throughout the country and achieved great success. It has been greatly supported and welcomed by the vast majority of workers. However, 70 sand application of the time is not long, there will inevitably be some imperfections. Many large, heavy-duty plant steel shop master reflect, 70 sand casting pouring, and sometimes dizziness, nausea, or even fainting and other symptoms. Tianjin Heavy Machinery Plant and other units have seen this phenomenon. This is directly related to the worker’s working conditions and physical health problems,