| 释义 |
luffing derrick
- galvanometricadj. 检流计的
- underachiever学习落后的学生，差等生
- 逆风航行nì fēng háng háng
luff
- 井架jǐng jià
derrick
- 钻油塔zuàn yóu tǎ
oil derrick
- 船首弯曲部chuán shǒu wān qǔ bù
luff
- 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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