中颅凹底巨大海绵状血管瘤的诊断和治疗。
Diagnosis and Treatment for the Giant Cavernous Hemangiomas in the Middle Fossa.
目的：为了更完全地切除中颅凹底内外沟通性肿瘤。
Objective: To completely remove the neoplasm at both the base of the middle cranial fossa and the infratemporal fossa.
凹底磨鞋可用于磨削井下小件落物以及其它不稳定落物。
The concave bottom mill shoe is used to grind downhole small objects and other unstable fallen objects.
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