以下为句子列表：
英文: Multi-arm caliper logging tool is mainly used for measuring inner diameter changes of the casings, provides evaluation data such as casing diameter changes, casing wall thickness, outer diameter variations of the casings, elliptic changes and equivalent d
中文: 多臂井径测井仪主要用于测量套管内径变化，提供套管变径、壁厚、套管外径变化、椭圆变形及等效破坏载荷等评价资料。
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