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
GRUMMAN A-6E TRAM INTRUDER
After the Korean war, American experts came to the conclusion that the piston attack aircraft is completely outdated. That is why the leadership of the U.S. Navy approached several...
“TRAP” IN THE SINK
I refused to offer the industry's trap — plastic perforated liner at the drain mouth of the shell: it has the shape of a hole and instantly get clogged even debris. Made of a plastic...
