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.
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“COTTAGE” FOR NUTRIA
Becoming a pensioner, was engaged in the breeding of the nutria (swamp beavers, or coypu) and saw how it is a profitable business. With the low maintenance costs of these herbivores and...
Biogas: heats and cooks
WHAT IS BIOGAS?
Recently, more and more attention has been drawn to unconventional — from a technical point of view — energy sources: solar radiation, sea tides and waves, and much...
