一平浪盐矿采用硐室水溶法回采已近40年，其工艺和技术已日臻完善。
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.
一平浪盐矿采用硐室水溶法回采已近40年，其工艺和技术已日臻完善。
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.
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