| 摘要 |
<p>A hydraulically controlled bulldozer-blade attachment with two half-blades (17, 18) which are linked to a liftable and depressable intermediate frame (12, the linking axes (15, 16) of the half-blades being at a backward incline relative to the vertical line with reference to the advance direction and each half-blade being controllable by a double-acting jack (24, 25) of its own. At their ends, the half-blades have sloping extensions (26, 27) which can be oriented about horizontal axes arranged in the direction of advance as controlled by double-acting jacks (31, 32).</p> |
