Based on the analysis of measuring principle of pneumatic gauge head, a high-precision pneumatic gauge head for taper measurement and its reference device are designed.

通过分析气动测头的测量原理，设计了高精度锥度气动测头及其校对规。

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Factor in a keyboard battery (at least on this reference device) and you can expect an additional three hours of runtime.

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The reference device on hand was operating in sync with a variety of unnamed hardware, protected from view in a relatively large sealed box.

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While he was up there, Mr. Taylor flashed a reference device -- a laptop hybrid with the keyboard and touchpad built into the carrying case.

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