Home / Standards / GB/T 20456-2012 GB/T 20456-2012 Abolished Forestry machinery - Portable chain-saws - Non-manually actuated chain brake performance 林业机械 便携式油锯 被动式锯链制动器性能要求及测试方法 Standard Type GBT ICS 65.060.80 CCS B95 Status 废止 Issue Date 2012-05-11 Implementation 2012-10-01 Responsible Dept 国家林草局 Drafting Unit N/A