| 释义 |
derrick substructure
- 井架jǐng jià
derrick
- 底部构造dǐ bù gòu zào
substructure
- 基础工事jī chǔ gōng shì
substructure
- 钻油塔zuàn yóu tǎ
oil derrick
- 路基lù jī
bed; roadbed; subgrade; substructure
- 架式钢卷尺jià shì gāng juàn chǐ
derrick type steel tapes
- 起重机qǐ zhòng jī
chain block, crane, derrick, hoist, lift
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