单词:oiled paper condenser
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axis, ['ksis] n 轴(虚构之线,如地轴,坐标轴) 【记】i象虚线-虚轴
019 Factory Tours Dialogue 1 A: We'd like to welcome everyone to the Michelson Tools factory site, and thank everyone for being here today. My name is Paul Shafer, I'll be showing you around today. Please feel free to ask questions at any point duri
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