contractualization of non-contratual promises-credit mechanism for labor and capital in drivate enterprises under game theory 民企內(nèi)部勞資雙方信用機(jī)制設(shè)計(jì)的博弈分析
service activities relating to domestic sewerage purification in non-collective sewerage areas-guidelines for a diagnosis of self-contained sewerage installations and for the contractualization of their maintenance 非污水收集區(qū)家用污水凈化服務(wù)活動(dòng).自備污水處理裝置的診斷及其維修合同指南