K'nex対角線＋２倍長法則.jpg
Atusi-hira
en
K'nex対角線＋２倍長法則, K'Nex
commons
ja
K'nex対角線＋２倍長法則、ケネックスのロッドの長さの関係
commons
en
K'nex's law of diagonals + doubling length, relation of Kennex's rod length
commons_translated
ja
K'nex対角線+2倍長法則、K'Nex
commons_translated