In the practice of the house master there is often a need in a small brush for cleaning small parts, corrugated surfaces, plates or printed circuit boards. Very convenient for this purpose, a regular toothbrush. It is only necessary to change (as shown in rience the configuration of its handles, heating over the flame of a gas stove or in boiling water. E. SAWICKI, g Korosten, Zhytomyr region.
Recommend to read
BUILDING A CHOPPER
I am a regular reader and admirer of "Modeller-designer", In turn, would like to offer the subscribers of the magazine the story of how I built a chopper. Amateur "copperstone"...
TALK THROUGH THE WALLS
Many years used the intercom system with loud-speaking simplex communication, consisting of a main panel and linear unit connected between a two-wire line. The radio was mounted low...
