| 1 | The result showed that two steps of sterilization by mercury improved sterilization effect for dormant buds; | |
| 2 | Result showed that 80% alcohol solution is better than 0.1% mercuric chloride solution judging from the surface sterilization effects. | |
| 3 | Result showed that 80% alcohol solution is better than 0.1% mercuric chloride solution judging from the surface sterilization effects. | |
| 4 | The support girder is evacuated to about 10 /. L of Hg to prevent air refraction effects from distorting or deflecting the alignment image (Hermannsfeldt 1965). |
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