| 摘要 |
PCT No. PCT/SE79/00178 Sec. 371 Date May 5, 1980 Sec. 102(e) Date May 5, 1980 PCT Filed Sep. 4, 1979 PCT Pub. No. WO80/00584 PCT Pub. Date Apr. 3, 1980.A ram block for driving piles and the like into the ground has a lead mass (15) which is enclosed in an inner cylinder (10) and in the space between this and an outer cylinder (11). The cylinders are interconnected at the lower end of the ram block where a cap (14) is arranged in the inner cylinder.
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