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Where are the facilities with the highest toxic chemical risk scores located in Greater ...
CLEVELAND, Ohio - Does more chemical emissions mean a higher risk to people who live near facilities that handle toxic ...
Hackaday
3 天
Replacing Selenium Rectifiers
Old radios often had selenium rectifiers to convert AC to DC. The problem is that the old units, dating back to 1933, are prone to failure and to release dangerous chemicals like hydrogen ...
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