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He is the only prop of mine.
他是我的唯一的支柱。
youdao
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The application of simple hydraulic prop in the face of small coal mine is expounded.
阐述了单体液压支柱在小型煤矿工作面支护中的应用。
youdao
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The application of simple hydraulic prop in the face of small coal mine is expounded.
阐述了单体液压支柱在小型煤矿工作面支护中的应用。
youdao