Investigation on the mechanical properties of open-hole spruce and douglas fir

Authors

  • Beijing Forestry Machinery Research Institute of State Forestry Administration
    Beijing, China

  • Beijing Forestry Machinery Research Institute of State Forestry Administration
    Beijing, China

  • Beijing Forestry Machinery Research Institute of State Forestry Administration
    Beijing, China

  • Beijing Forestry Machinery Research Institute of State Forestry Administration
    Beijing, China

  • Beijing Forestry Machinery Research Institute of State Forestry Administration
    Beijing, China