- calibrating screen
- smoke column
- 标定: demarcate; calibration; cali ...
- 用: 40分钟跑完全程 run the course in 4 ...
- 遮光片: anti-dazzling screen; fin
- 遮光片: anti dazzling screen; anti-dazzling screen; light slids; mat film; shade
- 暗室用遮光罩: darkroom hood
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