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US4343367A Drilling machine positioning arrangement 失效
钻床定位布置

Drilling machine positioning arrangement
摘要:
A positioning arrangement for a drilling machine or the like in which the desired position of a bit of the drilling machine mounted on a boom structure is indicated based on rectangular coordinates for facilitation of automatic positioning programming for the boom structure, with the position of a particular boom end being designated by numerical values for quick and accurate positioning of the boom structure at the required positions.
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