Что это такое - механизм на тяге или же механизм, который приводился в действие животными? или это, пардон мое незнание, одно и то же?

If, by the beginning of industrial-technical revolution, in many spheres of human activity, such as hunting, fishing, agriculture, transport, military field, the dominant position in technical means was occupied by mechanical means: hand and draught mechanisms, then in industry simple technical means continued to play the leading role.