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单词	pitprop
释义	pitprop noun : a usually wooden upright used as a temporary support for a mine roof Word History Etymology pit entry 1 + prop
随便看	affirmatively affirmativenesses affirmatives affirmatory affirmed affirmers affirming affirms affix affix-clipping affixable affixal affixation affixations deflective deflectometer deflector deflectors deflects deflexed deflexes deflexing deflexion deflexions deflexures

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