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传统相机快门
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传统相机快门
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传统相机快门
平时保护照相机内的感光胶片使之不会漏光,摄影时又通过开启与闭合动作使感光胶片获得所需的适宜曝光时间,及控制所摄运动体的影像清晰度的控制机构。
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wilderness rescue
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Wild evaporimeter
Wild Flowers by the Road
Wild Flowers of China
wild fruit tree
Wild Geese and Reeds
Wild Geese Descending on the Sandbank
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Wild Grass Soceity
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wildlife allowed for commercial utilization
wildlife domestication and breeding center
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wildlife monitoring by line transect method
wildlife monitoring by point sampling method
wildlife monitoring by quadrat sampling method
wildlife park
wildlife picture index
Wildlife Protection Law of the People's Republic of China
wildlife rescue center
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