| 释义 |
launching derrick
- interchangeabilityn. 可交换[交替]性
- interchangeableadj. 可互换的
- 井架jǐng jià
derrick
- 钻油塔zuàn yóu tǎ
oil derrick
- 发射台fā shè tái
launcher; launch pad; launching pad; pad
- 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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