Designating a system of well drilling in which the drilling column with the bit attached to it is rotated; relating to such a system.
| 单词 | θ210442 |
| 释义 | society > occupation and work > industry > drilling for oil or gas > [adjective] > method of drilling (3) rotary1901 Designating a system of well drilling in which the drilling column with the bit attached to it is rotated; relating to such a system. turbodrilled1948 slim hole1953 a drill hole of smaller diameter than normal; usually attributive (with hyphen). |
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