The model JD-2F bore-hole seismometer has been successfully developed on the basis of the model JD-2 deep well seismometer after improving technology and introducing electronic feedback technology.

JD - 2f型井下地震计是在JD - 2型深井地震仪的基础上，经过进一步的技术改进并引入电子反馈技术而研制成功的。

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It provides just the right amount of resistance and effort for spirited driving, but falls a bit short in terms of feedback, like many other modern electronic steering systems.

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Examine the savings and develop recommendations for implementing electronic submissions of information to the Federal government with immediate feedback to the submitter.

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