While selecting the model of the transformers, special attention should be paid on their strength of resistance to the short circuit, security and reliability of insulation, capability to resist to over excitation, as well as whether cooling device, oil storage box, oil tank, sleeve and monitor device have met the standards.

Effect of the size and the proportion of gas coal and coal-char on the consist-compressive strength of formed coke;

Influence of pressure head roughness upon compressive strength and test result dispersion of single crystal diamond;

Relation between compressive strength and fractal dimensions of jointed rock-mass;

Study on relationship between particle size distributional fractal dimension of cement particles and compression strength of cement mortars;

Discussion on notation about compression strength σ_d of metallic powder;

Study on the influence factors of compression strength of coking coal slime briquette;

Effects of the Number of Firing on Strength of Nano-ceramic and Traditional Ceramic in Metal-ceramic Crown Prosthsis;

Microstructures of the sintered specimens were examined by scanning electron microscopy and their strengthes and average coefficients of thermal expansion were tested.

Experiments show that the workability,the amount of cement and fine aggregate and the mechanical strength of concrete are influenced with the addtion of the fly-ash.