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某市的天然氣管道進(jìn)行改造,甲隊(duì)單獨(dú)做這工程需要10天,乙隊(duì)當(dāng)做這過(guò)程需要15天,丙隊(duì) |
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|關(guān)于我們|網(wǎng)站地圖|油氣儲(chǔ)運(yùn)網(wǎng) ( 魯ICP備11007657號(hào)-3 )
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