Detailed text transcripts for TV channel - DW - 20180501:18:54:00
Down most of these mines but it was also as we saw there you know very dangerous obviously for the workers at the time not only in terms of their health and their lungs for instance but also because of the frequent explosions in the conditions in the early mines now that of course led to some didn't revolutionary technology developed developments that we can talk about one of them was called the it's an emergency evacuation device called the dolly bush bomb so this is a cylinder tokio shape that was used to transport trapped miners back to safety through drilled bore hole that was developed an...
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