You need to carefully pour a viscous liquid (e.g. oil paint) from banks in a narrow-necked container or to fill in the gaps with the heated tar or mastic? Here you will rescue this type of nozzle, made of half cap from the same banks, tightly inserted in holes on the tube spout.
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NO BUTTONS, NO SWITCHES
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...
NOT WITH WAX, AND CLAY
For better preservation of volatile liquid vials are usually recommended to clog with wax. However, it is not convenient, if the bubble has to be open often. It is better to use clay:...
