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单词
crown block
释义
crown block
noun
:
a timber or steel pulley support connecting at the top the derrick posts of an oil well
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JPP
Jr
jres
jrs
js
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ju
juamave
juamave istle
Juan Carlos
juan de fu
Juan de Fuca, Strait of
Juan Fernández
Juan-les-Pins
Juana Díaz
Juaneño
juaneños
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juangs
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更新时间:2025/12/17 10:54:11