the second thing is some sort of unison bend but with the notes picked alternately. i would fret the 18th with the 3rd finger and the 15th with the index finger. rest the fingers on those notes and do the bend - it does not matter (imo) if the two notes are not seperated cleanly because the bend results in the same note as the one you fretted on the 15th e-string fret. infact the sound that is produced if both notes ring at the same time is a desired effect in most solos.
confusing?
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