目的：探讨胰管结石的X线特征和放射学诊断。
Objective: to research the X-ray characters and radiological diagnosis of pancreatic duct stones.
目的探讨输尿管阴性结石的影象学诊断价值。
AIM To study the diagnostic value of the imaging in the negative ureteral calculous.
相反，KEY III则适用于治疗软组织和硬组织(牙釉质和牙骨质)，在牙周病学中可轻柔地去除结石。
In contrast, the KEY III is suitable for the treatment of soft tissue and hard tissue (enamel and bone), and in periodontology for gentle calculus removal.
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