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Hace 27 minutos · 1680: Christiaan Huygens provides the first known description of a piston engine. 1698: Thomas Savery developes a steam-powered water pump: for draining mines; 18th century 1700s. 1709: Bartolomeo Cristofori crafts the first piano. 1709: Daniel Gabriel Fahrenheit invents the alcohol thermometer. 1710s
Hace 27 minutos · Hello lovely girls, Here we are again, ready for the T-Party hosted by Elizabeth and Bluebeard. I'm going to show you a drink or two of c...
Hace 27 minutos · 羟基丁苯胶乳 小编整理了以下信息供大家参考。点击此处下载标准sh/t 1609-1995 羟基丁苯胶乳全文pdf文件。本标准规定了羧基丁苯胶乳(xsbrl)45b、(xsbrl)45c的技术要求、试验方法、检验规则及包装、标志、贮存、运输等要求。