Can a fighter take Armored Master twice?

[Bob Genghis]

I know that feats cannot be taken twice, and certain class features like Magus Arcana cannot be taken twice (unless otherwise noted), but I don't see that restriction on Advanced Armor Talents.

Can a fighter take Armored Master once for a shield mastery feat, then a second time for an armor mastery feat?

[blahpers]

Several options have the same "can choose this option multiple times" text that feats have (e.g., Armor Specialization). Since the existence of that text in some feats is the primary rationale for disallowing taking other feats multiple times, I'd assume the same principle applies to fighter training options.