Without affecting the original painting production line basically, we had added a device of statically spraying powder to make the original production line carry out spraying the paint but also spraying the powder, this resulted the one line in the two uses and saved on the investment for the equipment.

The author introduced the technology of one film be twice used to plant maize and its economy and society benefit, pointed out that the technology fitting for to be popularized with good application foreground in Yuzhong county Gansu province.

Study on the Method for Amphibious Database of Spatial Database of GIS;