The humification cofficient of the wheat straw determined with the nylon bag method was 12.25%.

用锦法测定小麦秸秆在潮土中的腐殖化数为12.25%。

The wastewater of hexanolactam (nylon) fiber production in Shijiazhuang Synthetic Fiber manufactory is high concentrated with organic nitrogen compounds.

己内酰胺锦化纤废水属于浓度有机废水。