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1 Master Plumbers Convention, Display of Domestic Engineering Publishing Company1912-07-19Image
2 Master Plumbers Convention, Display of H. W. Johns-Manville Company1912-07-19Image
3 Master Plumbers Convention, Display of Mueller Rapidac1912-07-19Image
4 Master Plumbers Convention, Display of The Mine and Smelter Supply Company1912-07-19Image
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