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substructure /ˈsʌbməɹˌiːn ˈpaɪplaɪn/ n

中文：井架底座

中文 · 井架底座Español · estructura inferiorFrançais · massif de fondation
Meaning：Metal infrastructure that supports the derrick, engines and auxiliary equipment.
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Found in these illustrated scenes（1）

Drilling rig

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