ประโยคภาษาจีน : 中文句子 |
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xiàng dào 巷道 dǐ 底 gǔ 臌 wèn tí 问题 yì zhí 一直 zhì yuē 制约 zhe 着 méi kuàng 煤矿 de 的 Ān quán shēng chǎn 安全生产 |
The problem of dropsical roadway has been restricted at the end of the coal mine production safety. |