To fix the drawing paper on the drawing Board, a Board which is made of particle Board, is difficult. For anchoring one corner you have to use some drawing pins, as they bend. If you use a magnet like a hammer, then every button, holding it will be included in the Board and fix the paper.
A. PROKOPENKO, Kiev
Recommend to read
ULTRASOUND AGAINST RODENTS
Among the elastic vibrations of the air special interest to long causes imperceptible to the human ear ultrasound (from Latin ultra, next, over, beyond), the lower frequency limit of...
PLOW? NO MOWING
Perhaps no one in the right mind would plant potatoes otherwise than in the ground. And complexity used in this conventional technology well known. And because of the large gardens still...