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83/4" HM662XAG steenkoolwinning en bouw Dam voor olie goed boren Pdc boor Bit |
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83/4" HM962XA 5 Blade Matrix organ høj kvalitet og konkurrencedygtig pris Rock Diamond For Gas boringer |
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81/2" HM652XG China Manufactur satu Row minyak sedikit penggerudian |
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Wireline impregnati Diamond Core Bit |
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