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挖掘机cad图
挖掘机工作装置结构设计的cad图纸
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挖掘机液压系统的设计含cad图纸
is one of the pra ctical form of value s. The so-called val ues refers to the objective t hings are of no val ue and the val ue of fundamental perspective. Different values, people's behavi our, attitudes, ways are different. Pe ople -orie nted focus on huma n value a nd realit y, we need the broa dest masses as values. A dhere t o pe ople -ori ented val ues, i s to make the e conomy more devel op