Based on concern about rocks changing the physical characteristic of soil, affecting the growth of crop and causing the farming mechanization, and by analyzing homemade and foreign rock pickers, study on the mechanism of a surface harrow type wheel rack rock picker and the primary technique parameters of the select picking equipment was worked out.

This paper introduces several hydrogen production methods,including steam reforming,partial oxidation method,autothermal oxidation and plasma reforming,for fuel cell vehicle,and also points out the current technical status and future PNGV goals for on-board gasoline fuel processor.