He attached a series of multiplying levers to the steelyard scale, enlarged the platform, and overcame one of the serious hurdles to weighing large objects.
(He; attached; a series of multiplying levers) (He; enlarged; the platform) (He; overcame; one of the serious hurdles to weighing large objects)
He He He
attached enlarged overcame
a series of multiplying levers
the platform
one of the serious hurdles to weighing large objects