| 摘要 |
323,848. Marks, Sir G. C., (Ingersoll- Rand Co.). Nov. 1, 1928. Percussive tools. - In a rock-drill cradle the adjustment of the top plate B to or from the wearing plate C and its lateral adjustment are effected simultaneously by making the bolting flanges J at an angle as shown. Spacing pieces K are used for adjusting. |
