The bridge. -Apply the principle of stability triangle in its own. -Pyramid upside -The triangle does not soewe. -Reduction of base housing -3 photo-voltage distribution main square, square 4 formats better.
The bridge - the principle of triangulation stable in itself - inverted pyramid - a triangle Survey - the basing - the force distribution over a 3-way, 4-sided.
The bridge - uses the principle of triangle is stable on its own - - inverted pyramid triangle not survey - - reduce the blessing principle strong scatter image 3 square. Better image 4 square .