The test on the working enerty and brake hammer of 2T pneumhydraulic hammer has been done.

The sudden stop process of the elastohydrodynamic lubrication (EHL) of machine elements such as rolling bearings and meshing gears was simplified into a constant-loaded purely squeezing process which was suddenly transferred from a steady EHL state and during this process the EHL film was vanished gradually due to squeezing action.

In the paper,we study the method of sudden stop and its application in actual playing,and states out the particular function it performs,and give some pieces of advice on the development of basketball techniques and how to train these techniques in order to improve basketball Playing proficiency.

In light of the harm of water hammer in building water-supply system,the author introduces the causes of water hammer,analyzes the theoretical calculation of water hammer s pressure changing value,and proposes the measures should be adopted to avoid the damage from pump-stopping water hammer,in order to increase safe reliability of water hammer protection functions of building water-supply system.

<Abstrcat> A simple and practical direct alternative format for calculation of the characteristic line equations and boundary condition equations of pump-failure water-hammer were proposed.

The basic numerical calculation theory for pump-failure water-hammer was researched systematically in this paper.

Development and application of emergency shut-down device in ion-exchange membrane caustic soda production;

All kinds of emergency shut-down in BM 2.