Lunar explorer in HDR

It looks like one....
The lube oil reservoir of the generator shaftsealsystem of unit EC20.
Normally when the generator is filled with H2, the seals must be absolutely thight.
H2 is highly explosive when it comes in contact with air.
So a specially designed seal system with oil has to be used. The piping and pumps are placed in difficult narrow environment, maybe easy to ship as complete unit, but difficult to learn how it works.

In the foreground, some manually and electrical drives of valves in the condensatesystem, which are located in the basement.

Here in LARGE....