Meanwhile, common cast iron was used as the main material of the die so that the manufacture cost was lowered.
同时，由于采用普通铸铁作为模具主体材料，降低了成本。
At present, the main factors affecting raw material milk production efficiency are cow variety, cultivation time, the planter's trained degree and the fodder cost.
目前，影响原料奶生产效率的因素主要有奶牛品种、养殖时间、养殖者受培训的程度和饲草料成本。
Material cost is the main cost of coal enterprise, and the traditional material management methods can not adapt the market competition in modern logistics environment.
物资成本是煤炭企业的主要生产成本，传统的煤炭企业物资管理方法，已经不适应现代物流环境下的市场竞争。
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