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币率网是一个聚合全球流通货币的平台,本网站收集目前全世界最常用的币种信息大全,每日更新货币汇率实时信息。
Sigma Corporation of America is a subsidiary of the Sigma Corporation, a Japanese based family owned manufacturer of DSLR cameras, camera lenses and camera accessories. Founded in 1961, Sigma Corporation prides itself on high quality and innovative photographic equipment.
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