| 单词 |
boll-weevil hanger |
| 释义 |
boll-weevil hanger boll-weevil hanger[′bōl ‚wē·vəl ‚haŋ·ər] (petroleum engineering) A screw-on connector used to connect and seal the lower end of a length of oil-well casing to the next smaller casing string. |
| 随便看 |
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