... downward reference向下引用 guiding qi downward顺气 downward ventilator下向通风筒,吸气通风筒吸风机 ...
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... 向下多工 downward multiplexing 向下引用,向下参照 downward reference 向下变迁 downward transition ...
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... 顺流 Downward Compatibility 向下兼容 Downward Reference 向下引用 dpi ...
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