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Changing a gas cylinder for welding

* [(00:00)](http://youtu.be/bovoJUiyib0?t=0h0m0s)
* [(13:15)](http://youtu.be/bovoJUiyib0?t=0h13m15s)

* [(00:00)](http://youtu.be/bovoJUiyib0?t=0h0m0s) 13.0 min

(00:00)
(13:15)

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