revolving sector shutter的意思|示意
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旋转式扇形百叶窗
revolving sector shutter的网络常见释义
旋转扇形遮光器 ... 旋转式遮光器 rotary shutter 旋转扇形遮光器 revolving sector shutter 遮光器 dimmer; dissolving shutter; light chopper; light tight shutter; photocho er; photochopper; shade; shutter ...