The application of gas lift reverse circulation canal forming technology in joining the wall with the earth;

It is concluded that opening a technology groove is a good method to solve the problems in the large parallel clearance brazing.

Combining with the work practices,the trench construction process of the machine is introduced,and compared with the traditional hydraulic grab bucket.

As an example of underground continuous wall construction, this paper introduced the underground continuous wall construction technology, detailed the training wall construction, slurry trench construction, holes clearing, and the unit slot segment joints connections process, especially for the groove construction and achieved the desired results in final.

Compression mould design and forming process of minitype beam;

Effects of forming process on the characteristics of green tape and chip ceramic of PTCR;

Studies on Synthetic Process of Isocyanate Resins for Particleboard;

Study on synthetic process of low toxic urea-formaldehyde resin for bamboo particleboard

In this paper,based on the brief review of the development of waterborne polyurethanes,the synthetic processes of anionic,cationic,zwitteri- onic and nonionic waterborne polyurethanes are introduced in detail,and the advantages and disadvantages of their preparation methods are discussed.