... cold pressor test 释义：冷加压试验 copper stain test 释义：铜片试验 color fading test 释义：褪色试验 ...
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copper stain test copper-strip test 铜片试验
These desulfurizing agents proved to be excellent: reducing the total sulfur of LPG significantly and making the grade of copper stain test go down from 3 to 1.
结果表明，该脱硫剂脱硫效果很好，使液化气的铜片腐蚀从3级降至1级，总硫明显下降。
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