对于直井，弓型弹簧扶正器足以满足上述功能，并被通常使用。

For straight holes, bow spring centralizers are sufficient and commonly used.

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因为弓型弹簧比井眼稍大一些，因此在直井或倾角较小的定向井中能够完全居中。

Since the bow springs are slightly larger than the wellbore, they can provide complete centralization in vertical or slightly deviated Wells.

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将非线性有限元理论应用于机车受电弓弓头弹簧系统的研究。

A nonlinear finite element method was applied in the research of the collector head spring system of pantograph.

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