Titlebook: Berlin Die städtischen Gaswerke 1847-1897. Rückblick am fünfzigsten Jahrestage ihres Bestehens; Julius Springer, Berlin Book 1897 Springer

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gies. The book includes a large number of illustrations and video materials for SpringerExtras, along with a PowerPoint presentation that provides a useful resource for teachers and lectures.978-1-4939-5199-4978-1-4614-0571-9

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Air,alilei observed them through his telescope around 1611, since soon after which time they have been surveyed more or less continuously. A German apothecary and amateur solar observer, Heinrich S. Schwabe, suspected from his observations over the years 1826 to 1837 that the number of spots on the sola

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Chengqiang Zhao,Mingzhe Liu,Yanhan Yang,Feixiang Zhao,Shijie Chenperity deformation. A nanoindentation system (NanoTest.—Micro Materials Limited, UK) equipped with wear testing module was used to simulate single asperity deformation behaviour using a sphero-conical indenter of 10 .m tip radius, 60. included angle for a sliding distance of 60 .m under 50 and 100 m

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