• This time, instead of using charred paper, he took several strands of cotton, twisted these together into the shape of hairpin, and charred, or carbonized, this filament in an oven.

    这回不用烧焦代之棉线。他把几股棉线在一起发夹状然后把已搓的灯丝放在炉内烧焦,就是使之碳化

    youdao

  • This time, instead of using charred paper, he took several strands of cotton, twisted these together into the shape of hairpin, and charred, or carbonized, this filament in an oven.

    这回不用烧焦代之棉线。他把几股棉线在一起发夹状然后把已搓的灯丝放在炉内烧焦,就是使之碳化

    youdao

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