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单词
crown block
释义
crown block
crown block
[
′krau̇n ‚bläk
]
(petroleum engineering)
A wooden or steel beam joined to the tops of derrick posts of an oil well to support pulleys.
随便看
i'm going to ...
i'm going to kill
i'm going to murder
i'm going to the beach
i'm gone!
i'm gone.
imgp
imgr
imgs
imgsa
imgsac
imgt
imgta
img tag
imgu
imgui
imgv
imgw
imgyt
imh
imha
imhaa
i'm hanged if i know
i'm hanged if i know!
imhap
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更新时间:2026/5/7 16:51:17