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。
Roller gravity conveyors move product without motor power by using a slope to convey products. Rollers have spring loaded axles for easy removal or replacement.
无需发动机推力，只需要一个倾斜的坡度就可运输产品。
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