bottom hole coverage
| rate
| bottom hole coverage abbr. | |
| dril. | 钻头与井底接触面积; 钻头齿 对井底覆盖程度 |
| oil | 对井底覆盖程度 |
| bottom-hole coverage abbr. | |
| dril. | 井底覆盖 |
| rate abbr. | |
| environ. | 比率 |
| hydroel.st. | 计算; 变化率 |
| met. | 比例; 定值; 程度; 差率 |
| pest.contr. | 自然增长率; 剂量率 |
| sport. | 比率 |
| |||
| 钻头与井底接触面积; 钻头齿圈对井底覆盖程度 | |||
| 对井底覆盖程度 | |||
| |||
| 井底覆盖 | |||
| 钻头与孔底接触面积 | |||
|
bottom hole coverage : 4 phrases in 2 subjects |
| Drilling | 1 |
| Oil / petroleum | 3 |