According to the actual condition in the West Liao River Basin and the concept of triple-balance of water resources allocation,the authors conducted a long series of calculation of water resources allocation for different planning-level years with different schemes.

Through analysis of necessity and rationality of water supply and demand balance based on third balance law, it lays a theoretical base for the study.

In view that large top torque and negative torque are produced when crank balance (primary balance) is adopted, we present the secondary balance of beam pumping unit.

The newly-designed energy-efficient beam pumping unit adopted the spring energy storage device to achieve the secondary balance,whose structure,principle and main features were also analyzed.

The principle of equitable subordination is that when a corporation is hit by in going bankrupt、liquidation、reorganization,the corporation will discharge the loan with unjust behaviours after the other loans,to ensure all creditors can distribute equitably.