拖拉机上用的二行程半狄塞尔柴油机预热头(图3),根据原厂说明书采用耐热钢制造,经我们研究后改用铝铁合会浇铸,这样以铁代钢,既可降低成本又可节省贵重金属,下面仅将我厂试作的情况介绍以供兄弟厂参考. Semi-diesel two-stroke tractor Diesel preheat head (Figure 3), according to the original manual made of heat-resistant steel, after our study instead of using aluminum-iron co-casting, so that iron and steel, can reduce The cost can save precious metals, the following will only introduce the trial of our plant for Brother plant reference.