er meaning royal

spoken British used for talking to a queen, princess etc or to a woman of high rank in the police or the armed forces
British formal used in documents after the name of the British queen who is ruling

Coals and salt, machinery and manufactured goods, can be distributed easily from the great towns that produce them.
There should be a good opening for machinery for extracting the oil.

But the Holy Laws no longer needed the safe shelter of a royal shrine.
The Prince of Wales and other members of the royal family were present.

References:

http://www.dictionary.com/browse/machinery
http://www.thesaurus.com/browse/royal
http://www.uni-potsdam.de/en/fghi/areas-of-focus/acquisition-of-writing-and-reading.html