...企业生产效率；半参数估计 [gap=1045]Key words：export trade; wage level; wage premium; labor wage; enterprise productivity; semiparameter estimation ...
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供水泵站设计中采取节能措施，是提高城市供水生产企业生产效率，节能降耗的主要途径之一。
In the design of water supply pump station, energy-saving measures are the main way to raise the efficiency of city water supply enterprises.
因此，生产物流系统的研究是提高企业生产效率，降低生产成本，提高设备利用率的重要手段。
Therefore, study of the production logistics system is the important means to increase production efficiency, reduce production costs and improve the equipment utilization.
该系统大大缩短了印制板机械加工时间，提高企业生产效率，具有很好的应用价值和现实意义。
The research and exploitation of software system will shorten greatly the manufacturing time and improve production efficiency, which ha…
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