Since what you see here represented about the entire armored defense of West Berlin, we referred to them as "Speed bumps for the Russians".
One thing I never realized is that tanks can skid on icy pavement just like cars. I remember being stopped at the bottom of a slight hill and having an M60 sliding sideways at our vehicle, that was entertaining....
Gunnery, gunnery, gunnery. Hit the target, all else is twaddle!