Model Timer-stopwatch For 20 Minの無料動画を見ましょう

(18.6 MB) 27 Mar 2017に追加されました 108 回再生しました Home Tech Review Camera
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Model Timer-stopwatch For 20 Min

アニメーションの説明：

This is a mechanical timepiece which can be set to the desired time of 1 to 20 minutes. The timer has a unique roller pendulum and amplitude adjustment system on the back wall.
Our timer works from the usual clerical gum. When you move the arrow and lower the handle the countdown starts. Both minutes and seconds arrows operate.

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