https://linustechtips.com/topic/1599049-what-is-the-24-hour-rule-for-klm/

https://linustechtips.com/topic/1599049-what-is-the-24-hour-rule-for-klm/

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https://linustechtips.com/topic/1599049-what-is-the-24-hour-rule-for-klm/