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    • 【佳能EF-S 55-250mm f/4-5.6 IS参数】Canon EF .

      声明:仅供参考,以当地实际销售信息为准

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    • 250 mm - 英语 - 法语 翻译和实例

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      The 240 mm Howitzer M1, popularly nicknamed the "Black Dragon", was a towed howitzer used by the United States Army.The 240 mm M1 was designed to replace the World War I era 240 mm Howitzer M1918 which was based on a 1911 French design and was outdated by World War II. The project to replace the M1918 began in 1941. The 240 mm howitzer was the most powerful weapon deployed by .

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      【计算题】某燃烧炉的炉壁由 500 mm 厚的耐火砖、 380 mm 厚的绝热砖及 250 mm 厚的普通砖砌成。其λ 值依次为 1.4 W/(m·K), 0.1 W/(m·K), 0.92 W/(m·K) 。传热面积 A 为 1 m 2 。已知耐火砖内壁温度为 1000 o C,普通砖外壁温度为 50 o C 。试求 : (1) 单位面积热通量及层与层之间 ...

    • Canon 55-250mm STM Review - Ken Rockwell

      This Canon 55-250mm IS STM is an inexpensive, lightweight, fast and silent focusing lens that is also very sharp. The older models of 55-250mm IS and 55-250mm IS II were among Canon's best selling lenses, and this new lens adds instant manual focus override, silent autofocusing and even closer focusing than the older models.. All these Canon 55-250mm lenses super sharp, .

    • 加压送风口500x(900+250)是什么意思?_已解 .

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    • Ferrari 250 MM (1953)

      Ferrari 250 MM Two versions of the 250 Sport-derived 250 MM were built: a Pininfarina berlinetta, which hailed in a whole new era in design, and a barchetta by Vignale. Significant improvements had been made to both the engine and the suspensions with the addition of Houdaille shocks.

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    • 250 mm - 英语 - 法语 翻译和实例

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