The "45" was a small vinyl phonograph record designed to be played at 45 RPM (revolutions per minute) compared to the LP speed of 33 RPM. The smaller size and faster speed meant that each side of the record usually contained just one song (a single) of from 3 to 12 minutes in length.
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historyA record of events told in sequence is called a Chronicle.
The record for the consumption of chicken wings is 7.61 pounds, which were eaten in 12 minutes. This record was taken on September second two thousand twelve.
What is the center of a 45
to record stuff
In this case "minutes" means the record of a meeting. Thus "previous minutes" means a record of the last meeting (or an earlier one than that).