To withstand the strictly perpendicular direction when drilling holes in the wall or to any vertical surface— just attach to a drill with tape or duct tape carpenter’s level. His shifty air bubble in a glass tube, show that you have not rejected the tool from the horizontal.
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ELECTRONIC “MIRACLE”
You enter the room, and suddenly light flashes, "alive" is a radio or a tape recorder. To make such a "miracle" the strength of the capacitive relay (the diagram in the figure). ...
THE FILE — CHALK
When processing a file soft metal (or plastic wood) in the notches of stuck particles of cutting material, which is not easy then to get rid of. This will not happen if you RUB the tool...
