In order to overcome the stortage, the paper has introduced a new design method which is easy for road makingmachinery designer to use.
本文推荐的优化设计方法使用简便，可直接供筑路机械设计人员参考使用。
2
According to the indicative role of Protozoa, the author have judged the polluting degree of wastewater of electroplate, papermaking, machinery, woolen and the mixed wastewater on surface of ground.
根据各监测性原生动物的指示作用、判明了电镀、造纸、机械、毛纺及地面混合污水的污染级别。
3
Duplex stainless steel with the advantages of both austenitic and ferritic stainless steels, widely used in petrochemical, water treatment, papermakingmachinery and the load-bearing areas of bridge.