81/2" HM352XA tinggi kualiti pusat Bit Bit gerudi PDC piawaian pengilang untuk penggerudian berarah
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hot sale /diamond pdc drill bit /pdc drillling bits /petroleum drilling bits |
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alta qualità pdc punta diamantata, trivellazione petrolifera, standstone roccia pdc del trapano, per trapano di vendita, realizzato in Porcellana P... |
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