This article discusses balance compencation in casting,and researches feeding mechanism and process,finds that the point of the method is usage of extra pressure on feeder metal which comes from special pressure machine.

This paper introduced the casting method of balance replenish shrink and solved the key problem between time of casting valume shrink and time of replenish shrink of rising hend metal througn deducing and analysing on solidify time in casting.

Design of the Balance Compensation Control System of Chief Axis Ram for the Floor-type Boring and Milling Machine MCMG 180 LG

The principle of visual negative afterimage supplementary color balance was introduced.

The purpose of the paper is to assess the project of no net loss of cultivated land based on agricultural land classification, so as to provide technical support and practical foundation for evaluating the government in implementation of the policy.

Evalution method study on the farmland quality dynamic balance-A case study in bazhou county, Hebei pvovince;

It is a very important issue to keep dynamic balance of total amount of cultivated land and realize the sustainable development in China Socio-economic development.

With farmland quality dynamic balance in different agricultural ecological sections as the research object and based on the theories and achievements of farmland classification and grading,this paper analyzes the problems in the present work of dynamic balance and puts forward ideas and methods for farmland quality dynamic balance in different agricultural ecological sections and establ.