内外螺纹管接头 extension piece; 内外卡钳 hermaphrodite caliper; combination caliper; double caliper; scribing calipers; 内外自动电话系统 {电} inward-outward dialing system ..
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The multifinger caliper tool string to be used for casing inspection was centralized using the combination of a strong, optimally placed, spring loaded roller and stiff arm centralizers.
用于检查套管尺寸的多触点井径测量工具管串，采用结实的、安放位置经过优化的、弹簧加载的滚子及刚性臂扶正器进行居中。
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