This article mainly compared jouly steelyard and physical balance are applied in measuring the density of the method of hydrostatics,the results show that jouly steelyard have more advantage and innovation.

Hydrostatic Weighing Method for High Density Hydrometer;

Cable tension identification of beam string structures by static equilibrium method;

On the basis of the stability theory, this article used static equilibrium method and energy method to derive the effective length formulas of subdivided web member, and then compared the results of these two methods with that of current code of steel structure design(GB50017-2003).

Then,from the two aspects of energy balance and static equilibrium,the stress and strain of piles were analyzed,through which equilibrium.

There are some defects on the static equilibrium hydraulic motor similarly.

Influence of the seal ring s compressibility within gear pump on the bush s static balance;

Using static balance method of slide body, normal force on slip circle and safety factor of resistant heave stability are calculated, and the analysing method is verified by the practical engineering example.

Based on the results of a mass of grouted concrete masonry tests,deformation compatibility and static balance,the mean compressive strength,f_g,m,is presented by strength ratio of grouted concrete and block.