33:33light bulb lifespan tradeoffsExplainer
Longer-lasting light bulbs: it was complicated
Technology Connections
9 HN recommenders
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- Category: Engineering, Transport & Making
Results for “trades”
3 videos33:33
53:21steam heatingTalk
GSMT - Dan Holohan, Author: "The Lost Art of Steam Heating"
The General Society of Mechanics and Tradesmen
3 HN recommenders
13:12Sources and selection
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