“helical steel support”的概念、定义、翻译、参考文献-科学参考

单词	helical steel support
释义	helical steel support [`hel·ǝ·kǝl `stēl sǝ¦pȯrt] ^{MINING ENGINEERING} A continuous, screw-shaped steel joist lining used for staple shafts.
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