次に

Inside a Treadmill

4,143 ビュー· 10/23/23
Science Channel
Science Channel
1,316 加入者
1,316
Discovery

A treadmill s belt glides around two twenty-six pound steel rollers. Rubber bumpers act as shock absorbers as the feet pound down o the belt. Machines: How They Work THURSDAYS @ 10/9C ...

もっと見せる

 0 コメント sort   並び替え


次に