heliograph paper的意思|示意

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照相制版纸

照相版纸 ... helicoid serew converyor （无缝）螺旋运输器 heliograph paper 照相版纸 heliographic printing paper 照相版印刷纸 ...

日光照相纸 ... 涂塑相纸;plastic coated photographic paper;waterproo…… 日光照相纸;heliograph paper 绸纹照相纸;silk-finish-paper ...