| 摘要 |
PCT No. PCT/FI91/00184 Sec. 371 Date Dec. 17, 1992 Sec. 102(e) Date Dec. 17, 1992 PCT Filed Jun. 11, 1991 PCT Pub. No. WO91/19885 PCT Pub. Date Dec. 26, 1991.A feeding apparatus for a rock drilling machine (8). The feeding apparatus comprises a feeding cylinder (5) movable with respect to the feeding apparatus and a connecting cylinder (6) arranged around the feeding cylinder (5) movably in its longitudinal direction. To add a new drill pipe to a drill string, the drilling machine (8) is displaced by means of the connecting cylinder (6) and during the drilling movement by means of the feeding cylinder (5).
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