added tank factory by @bellator

http://content.open-ra.org/index.php?p=detail&table=units&id=290
Added allied command center by @NukemBro

http://content.open-ra.org/?p=detail&table=units&id=311
added repair depot by @CombineCR

http://content.open-ra.org/?p=detail&table=units&id=165
added center of aerospace by @CombineCR

http://content.open-ra.org/?p=detail&table=units&id=162
added ore purifier by @CombineCR

http://content.open-ra.org/?p=detail&table=units&id=145
added chassis factory by @CombineCR

http://content.open-ra.org/?p=detail&table=units&id=183
added industrial factory by @CombineCR

http://content.open-ra.org/?p=detail&table=units&id=166