The flow model of single phase flow in the elbow of the vertical tubular leacher was studied by using NaCl solution tracing and microcomputer sampling.
To carry out a method of tracing and investigation against the industrial sewage directly discharged into rivers so as to search the main pollutive source.
In this paper,methods for producing highbasis weight tracing paper and commonly adopted transparentizing agents are presented,and suggestions on producing high basis weight tracing paper are advanced.