stepped sector


  • 翻译:阶梯遮光板

同义词

1)stepped sector,阶梯遮光板2)step weakener,阶梯减光板3)neutral stepweaknener,中性阶梯减光板4)step sector,阶梯(减光)扇形板5)viser board,遮光纸板6)screening for lights,限光遮板

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