gas peak to valley ratio的意思|示意
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气峰谷比
gas peak to valley ratio的网络常见释义
瓦斯峰谷比值法 ...与瓦斯突出；瓦斯峰谷比值法；预测预报；炮掘工作面 [gap=834]Keywords : coal and gas outburst；gas peak to valley ratio；forecast and prediction；blasting driving face ...