The necessity of adjusting well ventilation system according to underground actual circumstance during many fan united operation period is introduced,which not only can develop the ability of each main fan,improve operation efficiency and effective air quantity,but also can make underground ventilation system further reasonable,stable,create a good safe and economic benefit.

The paper introduces principle of the HPY18-10/7-K air compressor, analyses failure reason points out matters paid out in the operation and gives out methods of removing the failure.

The paper expounds how to make the effective operation of "9+2" human resource integrating system through accelerating regional talent development, service integration and industrialization.

The absorption and translocation of nitrogen and their relationship to grain protein content in different winter wheat cultivars;

Effects of Irrigation Amount on Absorbability and Translocation of Nitrogen in Winter Wheat;

A Study on Cucumber Absorption and Translocation of Exogenous Sugars;