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机电产品的原材料费用占总成本比重是很高的,以载重汽车和农业机械为例,其原材料耗赞的费用约占其总成本费用的70％。世界各国的资源条件不尽相同,机电产品的设计与制造工艺水平各异,因而世界各先进工业国家都有其专门的制造技术和各自的材料体系(包括用材标准及技术条件和采购、检验规范等)。
The proportion of raw material costs for electromechanical products to total costs is very high. Take heavy-duty trucks and agricultural machinery as an example, the raw material consumption cost of the electromechanical products accounts for about 70% of their total cost. Different countries have different resource conditions, and the level of design and manufacturing processes for mechanical and electrical products are different. Therefore, each advanced industrial country in the world has its own manufacturing technology and its own material system (including material standards and technical conditions, and procurement and inspection specifications. Wait).