单词	drillstock
释义	drillstock /ˈdrilstäk / noun The part of a drilling tool or machine that holds the bit.Between each drilling stage, however, when the drillstock of the rod-installing apparatus is disconnected from the rod to enable the addition of another section to the same, it is necessary to maintain the pressure in the tunnel by other means.
随便看	admission admission day admission money admissive admit admittable admittance admittatur admittedly admitter admix admixt admixtion admixture admobile admonish admonisher admonishingly admonishment admonition admonitioner admonitive admonitively admonitor admonitorial

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