Bike pedals used to put a metal screw cap to protect the bearings from contamination. Now, instead, use the plastic plugs, which are often lost. Rescue plastic or nylon tubes from medical bubbles. Such substitutes being kept quite steady.
Recommend to read
“AUTONOMOUS LIFE” MFP
Multifunctional device consisting of copier, printer and scanner (hereinafter, MFP), it is useful not only for home or office desktop. In practice, there are times when a copier, printer...
PATROL WITH NUCLEAR WEAPONS
Bomber P2V NEPTUN. In the late 30-ies of the leadership of the U.S. Navy began to develop the requirements for patrol aircraft anti-submarine escort convoys and deep sea exploration. New...
