931 brief description of lead flow in the lab system
　　932 data sources
　　933 results and discussion
　　94 conclusions
　　references
　chapter 10 copper recycling in china
　　101 introduction
　　1011 background
　　1012 the investigative status quo of copper recycling in china and abroad
　　102 copper-flow diagram for copper products life cycle
　　103 an analysis of copper recycling for china in 2002
　　1031 a copper-flow diagram for copper products life cycle for china in 2002
　　1032 the copper ore index， copper resource efficiency and copper
　　scrap index of the copper industry for china in 2002
　　104 results and discussion
　　105 conclusions
　　references
　chapter 11 bulk-material flow analysis
　　111 introduction
　　112 basic b-mfa model
　　113 hidden flows
　　114 recyclable resources
　　1141 categories of recyclable resources
　　1142 the recycling time of resources
　　1143 the difference between amounts of recycled materials in the years τ and (τ +1)
　　1144 the influence of total input amount of resources on the cyclical use rate (m3，τ )
　　115 two important b-mfa indicators
　　116 case study on national level
　　references
　chapter 12 resou

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