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单词
fourable board
释义
fourable board
fourable board
[
′fȯr·ə·bəl ‚bȯrd
]
(petroleum engineering)
A platform installed in an oil derrick at an elevation of 80-120 feet (24-37 meters) above the derrick floor to support the derrick operator while pipe is being raised or lowered.
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rapprochement
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更新时间:2025/10/31 1:21:23