水冷式汽油发动机中的气缸体,几何形状复杂,它的内腔全是由泥芯形成的,而对这些泥芯的要求又很严格。根据以上特点我厂是用桐油和淀粉作粘结剂做成泥芯,因此成本很高,而且淀粉又是粮食。我厂工人同志在多快好省地建设社会主义总路线的教育下,终于在香店里 The cylinder block in a water-cooled gasoline engine has a complicated geometry and its cavity is entirely formed by mud cores, which are very strict requirements. According to the above characteristics of our plant is made of tung oil and starch binder for the mud core, so the cost is high, but starch is food. Under the education of building a general line of socialism in a country that is quicker and more economical, our factory workers’ comrades finally found themselves in the incense shop