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As the important steel of basic building components, screw-thread steel is widely used in such engineering constructions as buildings, bridges and roads. Its proportion of carbon emission is higher in building materials due to its large consumption so that the management and evaluation research of carbon footprint in its manufacturing process are particularly important. In this article, the key direction for its carbon reduction is found out through analyzing operation and conversion of carbon flow in its production process. The data of carbon emission and carbon footprint of products is qua.pngied as well as all of potential influencing factors are calculated with the LCA method so as to ide.pngy and control key areas of carbon emission, which could provide guidance for Baotou Steel to establish measures and plans of carbon reduction as well as environmental product declarations(EPD) of screw-thread steel products are successfully released on the EPD platform.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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