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Earthworms comminute the mineral fraction of soils.

蚯蚓粉碎土壤中的无机物碎片。

Objective To explore a new method and the feature of traumatism in sheep for zygomatic bone comminuted fracture by Bio impact device.

目的探讨羊颧骨粉碎性骨折的可行性、方法和损伤特。