Home / Standards / GB/T 8822.7-1988 GB/T 8822.7-1988 Active Seed zones of Chinese forest trees--Seed zones of Pinus yunnanensis Franch. 中国林木种子区 云南松种子区 Standard Type GBT ICS 65.020.40 CCS B61 Status 现行 Issue Date 1988-02-26 Implementation 1988-08-01 Responsible Dept 国家林草局 Drafting Unit N/A