This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
This has diesel engine hidden inside someplace mechanical drive maybe no electrical collection at all. The crane needs its own power anyway. Yes know in elder days these things were all electric and the operators just tried very hard to avoid any shocking incidents. This has diesel engine hidden inside someplace mechanical drive