But problem is that production brings not only private return to enterprise but also negative externalities to society, both of which affect the increase of social welfare.
但是，企业的生产不仅产生企业私人收益而且也可能带来外部不经济，这些都会影响社会福利的增长。
Improve the reliability of the machine for production, avoid unnecessarily increase of the cost of maintenance and affect the normal production.
提高机器的可靠性，避免为生产增加不必要的维修费用和影响正常生产。
With the mining depth increase in Yaoqiao Coal mine in Datun mine area, various nonlinear mechanics damages are appeared, which can seriously affect the safety production.
大屯矿区姚桥煤矿进入深部开采后，出现各类非线性力学破坏现象，严重影响巷道的正常使用。
With the mining depth increase in Yaoqiao Coal mine in Datun mine area, various nonlinear mechanics damages are appeared, which can seriously affect the safety production.
大屯矿区姚桥煤矿进入深部开采后，出现各类非线性力学破坏现象，严重影响巷道的正常使用。
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