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来源:雅诚德英语网
Oral nasal cup reduces fogging and lessens dead air space, limiting re-breathing of exhaled air.
口腔和鼻腔喷雾杯减少减轻死领空,限制重新呼吸呼出的空气。
Oral nasal cup reduces fogging and lessens dead air space, limiting re-breathing of exhaled air.
口腔和鼻腔喷雾杯减少减轻死领空,限制重新呼吸呼出的空气。