a tackle consisting of two standing single blocks, two running single blocks, a fall, and a runner, so arranged that it gives a mechanical advantage of six, neglecting friction.
Also, Bell's purchase .
a tackle consisting of two standing single blocks, two running single blocks, a fall, and a runner, so arranged that it gives a mechanical advantage of six, neglecting friction.
Also, Bell's purchase .
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012