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WebAug 26, 2024 · 近日,山西省能源局发布《关于推动煤矿瓦斯综合利用的指导意见》,严禁省内煤矿企业高浓度瓦斯排放。煤矿企业须严格落实《煤层气(煤矿瓦斯)排放标准(暂行)》(gb21522-2008),支持采用工业窑炉、民用、提纯等方式开展高浓度瓦斯利用。 WebGB235830A GB21522/24A GB2152224A GB235830A GB 235830 A GB235830 A GB 235830A GB 21522/24 A GB21522/24 A GB 21522/24A GB 2152224 A GB2152224 A GB 2152224A GB 235830 A GB235830 A GB 235830A Authority GB United Kingdom Prior art keywords bell iron wire improved apparatus crank lever coil Prior art date 1924-06-23 … a little birdie told me clipart
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