Present of "Bumblebees" in Ostrava region

This is about traffic of class 770/771 (former T669.0/T669.1), which is called "bumblebees", in Ostrava region. In this region now operates 770/771 of several companies: state company České dráhy (Czech railways), iron works Nová hu and private companies OKD Doprava and Slezskomoravská draha. This article pay attention also some interesting locomotives, e.g. the prototype of class T669.2, because this locomotive - now marked as 771.701 - is owned by OKD Doprava. There is also a mention about traffic of remote control Theimeg on locomotives in steelworks Nová hu.