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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 32771-2016 |
Tree seedling quality grading of Betula platyphylla Suk. 白桦造林苗木质量分级 |
China National Standards Tree seedling quality |
 English PDF |
| GB 6000-1999 |
Tree seedling quality grading of major species for afforestation 主要造林树种苗木质量分级 |
China National Standards Tree seedling quality |
English PDF |
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