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Dancers at a Cinco de Mayo festival at the Mission District, San Francisco, California. (Photo dated 2019.) holidays

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Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

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Aurochs. Bos primigenius. Skeleton. Extinct animal. Skeleton of an Aurochs, an extinct wild ox.

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positive clutch

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power transmission

In clutch
Positive clutches are collars with jaws that interlock, one member being rigidly attached to its shaft while the other slides on its shaft.
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