| 摘要 |
<p>According to the invention, the upper part of the marble block cut with the help of water and wire from the rock in the marble quarries is broken by means of the breaker on the tip of the excavator, a cavity is opened with a suitable shape and depth for the placement of the inner part of the push rod (2), then the breaker on the tip of the excavator is removed and the apparatus according to the invention is mounted in place of it. This apparatus is comprised of a main body (1), a push rod (2) placed on this main body (1) with suitable structure for entrance into the cavity formed on the upper part of the marble block and the pistons (3) which provide the motion for this push rod.</p> |
