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。
Laser beams could be sent down fiber-optic cable to power anything currently powered by copper wire.
镭射光也可以通过地下光缆来传输能量,来代替铜线传输。
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