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单词
blind ram
释义
blind ram
blind ram
[
′blīnd ′ram
]
(petroleum engineering)
A ram on a blowout preventer that acts as the closing element on an open hole; its ends do not fit around the drill pipe, but seal each other and shut off the space below completely.
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collisional
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collision blasting
collision broadening
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更新时间:2025/3/18 2:09:59