| 摘要 |
1,074,120. Excavator dipper arms. J. C. BAMFORD (EXCAVATORS) Ltd. Dec. 16, 1965 [Dec. 31, 1964], No. 52987/64. Heading E1F. The two parts of a telescopic dipper stick of a shovel excavator are locked together after adjustment to provide a dipper stick of a desired length by two pins inserted in aligned openings of the two series of openings formed along the length of each part. |
