| 摘要 |
A METHOD OF HARVESTING STANDING TREES IN A JUNGLE COMPRISING BRINGING A CRAWLER CRANE, PREFERABLY A HYDRAULIC CRAWLER CRANE, WITH A BOOM (14) TO A BLOCK OF JUNGLE, SECURING THE TREE TO BE HARVESTED TO A SLING IN THE BOOM, CUTTING THE BASE OF THE TREE, REMOVING THE CUT TREE USING THE BOOM AND LAYING THE CUT TREE ON THE GROUND AND CUTTING THE CROWN OF THE CUT TREE. IN ANOTHER ASPECT THE CROWN OF THE TREE IS CUT FIRST AND REMOVED BY MEANS OF A SLING ON THE BOOM OF THE CRANE. THE CRANE IS USED TO REMOVE THE CROWNLESS TREE OR THE CROWN LESS TREE IS CUT AT THE BASE AND ALLOWED TO FALL. MAIN ROADS SPUR ROADS AND SNIG TRACKS ARE CONSTRUCTED IN THE LOGGING AREA. TOTAL AREA DAMAGED BY THE CRANE IS LESS THAN 10% OF THE AREA TO BE HARVESTED.(FIGURE 1)
|
