ประโยคภาษาจีน : 中文句子 |
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yī píng 一平 làng 浪 yán kuàng 盐矿 cǎi yòng 采用 dòng shì 硐室 shuǐ róng 水溶 fǎ 法 huí cǎi 回采 yǐ 已 jìn 近 nián 年 qí 其 gōng yì 工艺 hé 和 jì shù 技术 yǐ 已 rì zhēn wán shàn 日臻完善 |
Stoping by solution mining in tunnel caverns, whose process and technology has been gradually perfect, has been applied in Yipinglang Salt Mine for nearly 40 years. |