Steel is the most common material for spring washers due to its ease of process and its high tensile strength. Chrome vandium alloy is a higher quality steel with a good through-hardening capability; it is used to make very thick spring washers.
How to Prevent Swimmerâs Itch. Thereâs no cure-all to eliminate swimmerâs itch. The negative symptoms are, ironically, a problem of our own immune systemâs making, and short of abstaining from swimming altogether, thereâs a risk of getting swimmerâs itch in a Northern Michigan lake.
Sidestroke Swimming Technique â Part 1. The sidestroke is a swim stroke swum on the sides. It is not used in competitions and therefore less known nowadays. Because it is swum on the side and uses asymmetrical movements of the limbs, it can look peculiar the first time you see it. Nevertheless it can add some variety to your swim sessions.