To lower or to raise from a well or wells cargo will allow here is a simple fixture. It consists of two stakes and relying on a steel rod with a diameter of at least 30 mm, with a cranked shank handle. Support stakes must be securely buried and located as close as possible to fix the well or wells. P. RADCHENKO, inventor
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I want to share with the readers one very simple method of drilling holes in the glass, which I was taught many years ago Professor N. A. Artemyev. The method is attractive because it...
