This is a Мобот-Ч-ХВ, decryption: "Мобот" - мобильный робот (mobile robot), "Ч" – Чернобыль (Chernobyl), "ХВ" – Химические Войска (chemical troops). It was designed and built by Moscow State Technical University for eliminate the Chernobyl accident. Now this machine, along with other robots, is on display in the Pripyat museum. My friend's photos -