Don_Dickle to Today I LearnedEnglish • 2 months agoTIL that those oxygen masks that come down inside airplanes are connected to individual “chemical oxygen generators” rather than a supply of oxygen gasen.wikipedia.orgmessage-square8arrow-up1239arrow-down13
arrow-up1236arrow-down1external-linkTIL that those oxygen masks that come down inside airplanes are connected to individual “chemical oxygen generators” rather than a supply of oxygen gasen.wikipedia.orgDon_Dickle to Today I LearnedEnglish • 2 months agomessage-square8
minus-square@SzethFriendOfNimilinkEnglish27•2 months agoCheaper and more reliable with a known expiration date that can be easily maintained.
Cheaper and more reliable with a known expiration date that can be easily maintained.