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rock bolt
释义
WordReference Random House Unabridged Dictionary of American English © 2024
rock
′
bolt′,
[
Mining, Civ. Engin.
]
Mining, Civil Engineering
a steel or fiberglass bolt inserted and anchored in a hole drilled in rock to prevent caving of the roof of a tunnel or subterranean chamber.
1955–60
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更新时间:2026/9/14 10:35:16