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hard coal
[冶金英汉词典]
是什么意思，hard coal的解释，hard coal的翻译
[新英汉石油技术词典] hard coal
[专利英汉词典] hard coal
[化学英汉词典] hard coal
[水利英汉词典] hard coal
[海运英汉词典] hard coal
[煤炭科技英汉词典] hard coal
[电力英汉词典] hard coal
[石油英汉词典] hard coal
[经贸英汉词典] hard coal
[能源英汉词典] hard coal
[航海英汉词典] hard coal
[进出口英汉词典] hard coal
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hard coal_冶金英汉词典
hard coal_冶金英汉词典
