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Lubricant - Wikipedia
History. Lubicants have been in some use for thousands of years. Calcium soaps have been identified on the axles of chariots dated to 1400 BC. Building stones were slid on oil-impregrated lumber in the time of the pyramids.
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Steven Terner Mnuchin was sworn in as the 77th Secretary of the Treasury on February 13, 2017. As Secretary of the Treasury, Mr. Mnuchin is responsible for the executive branch agency whose mission is to maintain a strong economy, foster economic growth, and create job opportunities by promoting the conditions that enable prosperity and
history of technology | Summary & Facts -
History of technology - The 20th century: Recent history is notoriously difficult to write, because of the mass of material and the problem of distinguishing the significant from the insignificant among events that have virtually the power of contemporary experience.
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