3 الموسم
46 حلقة
Why Is It So? - Season 1 Episode 15 الحلقة 15
With a great many tools before him, Professor Miller sets out to prove that all tools and machines are linked to the two simplest: the lever and the inclined plane.
- عام: 2012
- بلد: Australia
- النوع:
- ستوديو: PBS
- الكلمة الرئيسية:
- مخرج:
- المصبوب: Julius Sumner Miller