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单词
guide ring
释义
guide ring
guide ring
[
′gīd ‚riŋ
]
(mining engineering)
A longitudinally grooved, annular ring made almost full borehole size, which is fitted to an extension coupling between the core barrel and the first drill rod.
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dmt ii
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dmtt
dmttf
dmtu
dmtv
dmu
dmuc
dmuce
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dmucs
dmufog
dmug
dmui
dmukya
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更新时间:2026/9/28 5:33:36