In addition,the traditional design of wide inlet scoop of particleboard cross-cut saw resulted in large flux,big pressure loss and severe pollution,however,after turned from fixed wide inlet scoop to mobile narrow inlet scoop,the three indexes above-mentioned were improved greatly with good economic and social benefits.

The layout and the floating viewport, as created in the AutoCAD object model to print a reasonable offer great convenience, the layout and clever use of the floating viewport as a powerful function, can model in the drawings of arbitrary objects organizations and arrangements, the desired effect.