第一廿厂铸铁车间,过去对熔铁的配料,主要技术问题,都掌握在老工友手里,一切根据生铁断面的粗细来估计含　的成份,对於强度及硬度根本无法控制。譬如,以前所做的200Hp气压缩机,抗张力约16kg/mm2附近,硬皮约140B.H(指气缸)因为老工友们比较保守,(尤其是翻砂工人)而固执不肯轻易 In the first cast iron plant, in the past, the ingredients of the molten iron, the main technical problems, are in the hands of old workers, and all the ingredients are estimated according to the thickness of the cast iron section, and the strength and hardness cannot be controlled at all. For example, the 200Hp gas compressor that was previously used has a tensile strength of about 16kg/mm2, and the hardened skin is about 140B.H (referring to the cylinder) because the old workers are more conservative (especially the sand-rolling workers) and the stubbornness is not easy.