“mechanical yielding prop”的概念、定义、翻译、参考文献-科学参考

单词	mechanical yielding prop
释义	mechanical yielding prop [mi`kan·ǝ·kǝl `yēld·iŋ ´präp] ^{MINING ENGINEERING} A steel prop in which yield is controlled by friction between two sliding surfaces or telescopic tubes. Also known as friction yielding prop.
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