Jacksonville Public Library
Coal-mining machinery
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http://bibfra.me/vocab/lite/Topic
Label
Coal-mining machinery
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6
Coal-mining machinery + Safety regulations
Coal-mining machinery + Law and legislation
Coal-mining machinery + Automatic control
Coal-mining machinery + Protection
Coal-mining machinery + Automation
Coal-mining machinery + Electric equipment + Protection
Focus of
4
Coal-mining machinery -- United States -- Noise -- Safety measures -- Cost effectiveness
Coal-mining machinery -- United States
Coal-mining machinery -- United States -- Safety measures
Coal-mining machinery
Sub focus of
6
Coal-mining machinery + Automatic control
Coal-mining machinery + Law and legislation -- United States
Coal-mining machinery + Electric equipment + Protection
Coal-mining machinery + Safety regulations -- United States
Coal-mining machinery + Automation
Coal-mining machinery + Protection
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