it's an antique device for carbonating wather (put carbon dioxide in the water) for making the "sparkling water" Abusive comment hidden. (Show it anyway.)
it'a a indicating weel, it can be used to indicate the percentage of completion of a given task, it can be administrative, a chemical prosses, etc.(SORRY ABOUT THE ENGLISH) Abusive comment hidden. (Show it anyway.)
the second one is a tool used to grab two ropes, while the first one is a clothing (or hair) accesory (you use it to put some clothing). Abusive comment hidden. (Show it anyway.)
(SORRY ABOUT THE ENGLISH)