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Most oils nowadays are 50:1. The great thing now is that an air cooled engine two cycle oil often comes in a package that mixes a gallon of gas to the correct amount. Beware of outboard motor oil as those engines are water cooled, not air cooled (heat is different.)
A wire feeder is cooled by water, and air it depends on what type of wire your using. A wire feeder in the field is often not cooled by anything, but has accessories to keep the the neck and handle cool and from burning your hand.
Superconductor
Metals, like most solids will contract when cooled. When cooled the atoms or molecules slow down, vibrating less often, causing a smaller average separation between them.
Motor speed is a term we often use to speak to the rotational speed of a motor. And often we talk about the speed of rotation in revolutions per minute, or RPM.
Work for their masters. They were often referred to as property
most often blown meaning supercharged - air being forced into the engine by a belt driven device..look on howstuffworks.com for a bunch of info. or it could also be referring to an engine that has "blown up" - blown a piston or rod etc.
Forced foot worship is a sub-genre of domination and submission role playing; most often it is something that is not completely forced but the second party enjoys being manipulated.
Reparations
1000hrs
These reverse processes are both part of the water cycle
Stays nearly the same but the surface temperature