by yamachem - uploaded on March 6, 2015, 1:26 am
The image of the spring which includes the camshaft.
I think the contrast of red and black is not so bad.
I uploaded it as a joke.
you normally are not supposed to explain jokes.
even if others don't realize it,
So,I will not,either.
I used the clipart "Box with spring " uploaded by "nicubunu" from OCAL