The evolution of pro-eutectic austenite in semi-solid high chromium cast iron was studied by self-made slope sampling plate through metallographical image analysis system.

Methods general nutrition AGAR plate and rabbit blood nutrient AGAR plate of the hospital environment for the settlement of air sampling tests and the results were compared.

Bring the sampling to the laboratory under low temperature circumstances, then, census the total numbers of bacteria by fluorescence microscope and vibrio by selection technique of plate cultivation.