“obstacle clearance box”的概念、定义、翻译、参考文献-科学参考

单词	obstacle clearance box
释义	obstacle clearance box [`äb·stǝ·kǝl ¦klir·ǝns ´bäks] ^NAVIGATION A rectangle on an aeronautical chart which encloses a number indicating the obstacle clearance required (in feet) on an approach segment where the box appears.
随便看	third-generation computer third harmonic third law of motion third law of thermodynamics third-order climatological station third-order reaction third-order relief third proportional third quadrant third rail third sound thirling thirst thirty-day forecast thirty-two nucleus Thisbe thistle thiuram thixotropic clay thixotropy Thlipsuridae tholeiite Thoma cavitation coefficient Thomas converter Thomas cyclotron

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