What doese cc stand for?

And what do you mean it is more than just a screw? I know you have to adjust the screw to a certain level, that is why I am asking for the lenth of the screw in the davis diesel heads.
I have seen the davis heads and they are just like the glow heads, I saw someone post it here somewhere but I couldn't find the post.
Do now how I can get the ether from a spray can into a nonspary can.
thanks for posting