Then base on the object-oriented theory of software engineering & PDM theory, one object-oriented model of LED lamp is presented.
然后根据面向对象的思想和产品数据库管理理论，提出了面向对象的LED灯具建模解决方案。
At first, the paper gives analysis to the theory and technique of Product Data Management (PDM).
本文首先对产品数据管理(pdm)理论和技术进行了深入的分析。
Right according to the stacker crane's CAD system oriented PDM proceeds than for completely in depth research, have the certain theory meaning and the importance's engineering application value.
对基于企业PD M系统的塔机CAD系统进行了较为全面深入的研究，有一定的理论意义和重要的工程实用价值。
Right according to the stacker crane's CAD system oriented PDM proceeds than for completely in depth research, have the certain theory meaning and the importance's engineering application value.
对基于企业PD M系统的塔机CAD系统进行了较为全面深入的研究，有一定的理论意义和重要的工程实用价值。
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