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  1. 1
    Two-phase parallel cut with millisecond initiation of group of snubbing holes

    Two-phase parallel cut with millisecond initiation of group of snubbing holes von MA ACZY SKI KRZYSZTOF, DULKO TADEUSZ, J DRUSIAK RYSZARD, PODCHUL WITOLD

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  2. 2
    Method for open-end mining of low-depth covers

    Method for open-end mining of low-depth covers von KOBZI SKI JAN, K ECZEK ZBIGNIEW, MATUSZ CZES AW, J DRUSIAK RYSZARD, KOSIOR ALEKSANDER, BUTRA JAN

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  3. 3
    Method of underground mining of low thickness ore using the chamber and pillar system

    Method of underground mining of low thickness ore using the chamber and pillar system von IWULSKI ZDZIS AW, SADECKI ZBIGNIEW, BRYJA ZBIGNIEW, J DRUSIAK RYSZARD, NOLKA ZBIGNIEW, D BKOWSKI RAFA, KOSIOR ALEKSANDER, BUTRA JAN, CIESZKOWSKI HENRYK

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