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<正>Dear Colleagues,On behalf of Science China Materials,I would like to invite you to submit an original research or review article for a themed issue(Advances in Metallic Biomaterials)which is organized by Prof.Yufeng Zheng(Peking University,China),Prof.Lawrence E.Murr(University of Texas at El Paso,USA)and Prof.Cuie Wen(RMIT University,Australia)as guest editors.  相似文献   

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<正>In recent years, two major challenges have arisen in the field of measurement and instrument technology. One is the redefinition of the seven basic units in the international system of units(Système International d’Unités or SI). The SI is now based on fundamental physical constants, with full implementation having occurred in 2019.  相似文献   

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The products of ecological textile have represented now adays the new trend of global consum ption and pro-duction of textile w hile becom e an im portant m eans for som e countries to utilize “green barrier”as a lim itation of im port of textile products. Follow ing the entrance of China into the W TO , the position of “green barrier ”be-com es significantly im portant in the trade of textile products. A s China is a big country of textile production, speeding up the research on standar…  相似文献   

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