“L”型林木生长凿的制作与使用

The manufacture and use of L-form forest growh chisel

介绍了一种调查乔木树种生长率的新型工具"L"型林木生长凿,对其结构、特点、制作和使用方法进行了说明。

L-form forest growth chisel using for the investigation of arbor growth rate was introduced. And analyzed its structure,characteristic,manufacture and using method.