I'm sorry if this is not the right site but I really don't see another more suitable on Stack Exchange. Some Soviet tanks have these canister-looking things that hang down off the sides of the hull, very near the wheels. Some of them appear to be tilted. Here's a photo of them ...
Further, here is a 3D model of an IS-3 so you can get a really good view of these. The ones that are tilted on this one are different. They appear to be different on each one:
Here is another 3D model where you can see these. Again these are different ones.
Do these things just become loose and end up twisting? What do you think they could be?
Also, if you look at the first photo, on many of these tanks the left side of the suspension and wheels are set back slightly from the right side. It's quite subtle, and strange. Does anyone know why this is? This offset I'm speaking of is really subtle. The first model has it, the second model doesn't. The first one being obviously more accurate.
Edit: Someone has suggested it looks like a shock absorber, here is a screenshot from a good position.
Also, someone pointed out that in the first model I linked some of these are missing above some wheels, about 3 or four. In this picture you can also see some missing. I'm really confused about this.