合适的波美浓度是38到40度之间。
如果波美浓度太低,则可加入高浓度的三氯化铁溶液。
If Baume concentration is too low, you can add high concentrations of ferric chloride solution.
它的波美浓度在蚀刻环节中非常重要,直接影响到蚀刻的速度。
It's part of Baume concentration is very important in the etching, a direct impact on the speed of etching.
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