| 单词 | bull-wheel |
| 释义 | > as lemmasbull-wheel bull-wheel n. (see quot.). ΘΚΠ society > occupation and work > equipment > oil and natural gas recovery equipment > [noun] > drilling equipment > devices for raising or lowering oil derrick1863 bull-wheel1883 wire line1896 1883 Cent. Mag. July 329/2 Attached to the derrick is also a big windlass, called the ‘bull-wheel’, which hoists the drilling apparatus out of the [oil] well. < as lemmas |
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