Key lerms

摘要

Comminution: Breaking, chopping, grinding or other milling of larger objects into smaller particles. Grain: Predominant direction in which wood fibers are aligned in a log or resulting particle. In conifers, the grain direction is parallel with the stem of the tree. Specific energy: Actual work energy that goes into an activity net of mechanical drive inefficiencies, electrical power factor losses and friction. For the purposes of this article, specific energy is expressed as megajoules per oven dry megagram.