When the pencil lines of the drawing or drawing close to each other — the usual eraser, it is difficult to remove the erroneous one so as not to damage the adjacent correct. But this operation will be virtually the exact jewelry and if a thin slice of gum to hold in the “beak” of the spring: simple and convenient.
Recommend to read
Canoe like the Indians used
“A canoe made of birch bark... the most convenient and lightest of all means of travel. The bark of one birch tree is usually enough for one canoe; they have such a sensible shape that...
Opposed engine — beyond competition!
This two-cylinder engine, designated DD-700/40, was designed and built by Georgy Dorfman, head of the public design bureau "Aerosam". The motor turned out to be exceptionally successful:...
