“helper set”的概念、定义、翻译、参考文献-科学参考

单词	helper set
释义	helper set [`hel·pǝr ´set] ^{MINING ENGINEERING} A set of timbers to reinforce the normal set of timbers in a mine.
随便看	gyrocompass gyrocompass alignment gyrocompassing Gyrocotylidae Gyrocotyloidea Gyrodactyloidea gyrodynamics gyro error gyro flux-gate compass gyrofrequency gyrogonite gyro graph gyro log gyromagnetic compass orthogonal series orthogonal spaces orthogonal sum orthogonal system orthogonal trajectory orthogonal transformation orthogonal vectors orthographic chart orthographic projection orthohelium orthohexagonal axes

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