用SPEX冷冻研磨机从古代骨做的DNA分子生物研究

For several decades biologists
have looked for ways of
recovering irúormative biomole即
cules from the remalns of dead
animals and plants SPEX6770 全自动冷冻研磨机 SPEX6870 全自动冷冻研磨机 SPEX6970EFM 冷冻研磨机