How to use a presta valve on a bicycle

How to use a Presta Valve on a Bicycle. They are more delicate than Schrader valves, be careful. To inflate or deflate unscrew the little nut attached to the shaft. When done finger tighten gently till no air escaping. Not all have removable valve cores. Full video on my channels YouTube, Rumble & Odysee. Links on my website.
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