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sublevel caving hydraulic support
释义
sublevel caving hydraulic support
[?s?b?levl ?keivi? ha??dr?:l?k s??p?:t]
释义
放顶煤支架
行业词典
煤炭
放顶煤支架???用于放顶煤采煤工艺的专用液压支架。???
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Jantzen
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January
January 1
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january 6s
January Barometer
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januarye
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更新时间:2026/8/16 3:32:58