Someone had to drill holes in the ceiling, he knows, as a way to work from the dust and concrete crumbs. Ways to protect the face exist. One of them use dust cups — often plastic caps from aerosols. However, such improvised traps are ineffective: a glass, put on the drill bit rotates with the same peripheral speed and scatters, like a centrifuge, something that needs to collect.THE ON THE STOVE
In photography, especially in color expression and of the press, higher than usual temperature of applied solutions, and to maintain it constant during the entire time of processing film or paper. Experiment with electric heater: with its help, if necessary using additional paper or fabric strips, you can find and to provide the necessary temperature Read more…








The proposed indicator allows you to capture voltage of 6 — 12V (i.e., below the ignition of the neon lamp) and above. In contrast to the known similar kind of indicators, there are no buttons and limit switches measured values, which a wrong selection can lead to distortion of information, and even to failure of the device.

