GB/T 4269.4-2014
农林拖拉机和机械、草坪和园艺动力机械 操作者操纵机构和其他显示装置用符号 第4部分:林业机械用符号
Tractors, machinery for agriculture and forestry, powered lawn and garden equipment.Symbols for operator controls and other displays.Part 4: Symbols for forestry machinery
GBT4269.4-2014, GB4269.4-2014