以往测量树径,所用工具为轮尺或围尺.这种方法比较麻烦,有的测后还要换算,操作不便,精度差,效率也低.辽宁省林科院赵彤堂副研究员发明了一种新的方法,不用卡,不用围,只需用专门的测径靠尺在树干上一靠,即能完成树木直径的测量.测径靠尺由角度式尺臂、动尺、读数窗等组成.实测时,先将 In the past the measurement of tree diameter, the tools used for the caliper or Wai ruler .This method is more troublesome, some even after conversion, inconvenient operation, poor precision, low efficiency.Linning Academy of Forestry Zhao Tong Associate Professor invented a The new method, without the card, not Wai, just a special caliper by the ruler on the trunk by a, that is able to complete the measurement of the tree diameter. Diameter rulers by angle-foot arm, moving ruler, reading windows and other components When measured, first