To measure the thickness or diameter of small fasteners do not have to have a caliper: rescue improvised version of conventional clothespins. It is sufficient to attach the metal plate coated with graduations as shown in the figure. I. KORENEV, Korolev, Moscow region
Recommend to read
TRAPPED IN THE”HOLLANDS”
The views of Americans on submarines before the First world war was somewhat different from those in European fleets. Overseas shipbuilders in those "baby" years of development of...
PNEUMATOS WITHOUT FICTION
For transportation of large cargo by land over distances of hundreds and thousands of miles of not-yet-invented method than the railway. It accounts for in the country about two thirds...
