This paper concerns the rational selection type of secondary logging in Heilongjiang forest area by productivity and productive cost.
这篇文章通过生产率和生产成本讨论了黑龙江林区二次集材选型问题。
This paper introduces the type selection of compensator in the outlet pipeline of storage tank and rational selection of material as transporting corrosive media.
介绍了储罐出口管线软连管的选用及在输送腐蚀介质时如何进行合理的材料选择。
应用推荐