The paper analyzes different air conditioning process, and the result shows that the combination of a central fresh air handling system of the whole surgery department and several secondary return air systems of each surgeries should be the first choice of air conditioning system in cleaning surgery design scheme.

Study on Secondary Seismic Acquisition in Southern Steep Zone in Biyang Depression;

Througn designing three axial slots in internal threaded portion and optimizing nib structure,a design was made on the injection mould with a two-step ejecting mechanism with non-rotating.

Reheating Process for the Semi-solid A356 Alloy;

Detection of the Reheating State of Semisolid Hypoeutectic Al-Si Alloy;

The effects of processing parameters of semi-solid billets preparation,reheating temperature and holding time on the semi-solid slurry microstructure of AlSi7MgBe alloy by liquidus semi-continuous casting were studied.

The contact pattern of boiler auxiliary machinery was modified with the adoption of layer-by-layer coal charging technology,realizing secondary dedusting,improving the heat efficiency and reliability of boiler.

Appropriate choice of top draft hood type is a key point for the modification project of secondary dedusting of converter off-gas at Xingtai Steelmaking Plant.