Record🤔

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value:

text:

"Didn’t we use propane/butane and other hazardous gases like ammonia in early refrigeration systems? Their useful phase change properties have been known for a very long time. 

I was under the impression CFCs/HFCs were formulated as a less hazardous (at least in the short term) replacement for them."

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"app.bsky.feed.post"

langs:

• "en"

reply:

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createdAt:

"2024-09-17T03:17:25.273Z"