FactCheck
summarizes the administration's position as Iran _could_ have a very large number of centrifuges (say, 190,000), so long as they're for civilian purposes (with military ones (!) limited to under 7,000). What Harf et al completely overlook (presumably deliberately) is those "peaceful" centrifuges could be "converted" to military use overnight. To Bibi's point, once that vast number is applied to military use (which the 10-year deal allows) it will be mere weeks to production of nuclear weapons - never mind the possibility of violating the agreement and commencing nuclear war before any diplomats come to grip with the violation.
Just a reminder to people, back during the Bush years we were told repeatedly that 3,000 centrifuges were enough to build one bomb per year.
They reached that threshold in 2007.
190,000 centrifuges by that math should be able to produce over 60 bombs per year.