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合山煤系
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heshan coal measures
合山煤系
晚二叠世合山组地层发育时期连续沉积形成的一套含有煤层并具有成因联系的沉积岩系。
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safety technology of flowing well
safety technology of gas station
safety technology of logging and perforating operation
safety technology of logging coring operation
safety technology of melting equipment
safety technology of oil and gas Long distance pipeline
safety technology of oil and gas testing instruments
safety technology of oil production
safety technology of petroleum drilling
safety technology of pumping unit
safety technology of well logging blasting
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safety test of nuclear weapon
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safety threshold of soil pollutants
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safe valve
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