AENOR UNE 22665 ROCK DRILLING. EXTENSION DRILL-STEEL EQUIPMENT FOR PERCUSSIVE LONG-HOLE DRILLING. REVERSE BUTTRESS-THREADED EQUIPMENTS 1 1/2 TO 2 1/2 IN (38 TO 64 MM).. Формат поставки-PDF. Язык стандарта-Испанский
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