More German info needed

For various reasons I want to illustrate my tunnelling machine adventure (see various previous posts) with a sketch of the machine as originally outlined by the Kaiser, who is responsible for its creation. I've used Google for the German translation, is this OK or hopelessly wrong:

( Concept sketch )

I'm trying to decide if I really need to provide translations for other things, such as the names of offices. It'd save me a lot of hassle if I don't, what I'm wondering is if people will feel short-changed if they aren't there, since the adventure is set in Germany.