If you make the fixture shown in the picture, then cropped the Wallpaper strip will have the same dimensions and strict perpendicularity of the cutting line.
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WEIGHTLESSNESS… IN THE CLASS
The phenomenon of weightlessness allow you to demonstrate on a normal school lesson original instrument, developed at the physics Department of the Khabarovsk pedagogical Institute, the...
PIN.. THE FONT
If the posters or wall Newspapers transferable adhesive you use fonts, for of application, use a homemade tool — a common pin with head ball stuck in the end of a pencil.
