GB/T 7227-1999 in English

《GB/T 7227-1999林业机械图形符号》由TC61（全国林业机械标准化技术委员会）归口，主管部门为国家林业和草原局。
本标准规定了林业机械中的营林机械和木材生产机械部分典型和常用工作零部件及整机的图形符号。本标准适用于林业机械的生产、科研、教学和学术交流中各种简图的绘制（如总体配置简图、结构简图、机动图、工艺流程图、系统图等）。

Scope

This standard specifies the graphic symbols of typical and commonly used working parts and complete machines of forestry machinery and wood production machinery in forestry machinery. This standard applies to the drawing of various diagrams (such as overall configuration diagrams, structural diagrams, motor diagrams, process flow diagrams, system diagrams, etc.) in the production, scientific research, teaching and academic exchanges of forestry machinery.