| 单词 |
friction blocks |
| 释义 |
friction blocks friction blocks[′frik·shən ‚bläks] (petroleum engineering) Thin blocks with cylindrical surfaces that drag on the inside of the well casing to prevent rotation of the packer (seal between the outside of tubing and inside of casing). |
| 随便看 |
- ershov, petr
- ershov, petr pavlovich
- ershov, vladimir
- ershov, vladimir lvovich
- ershov, vladimir stepanovich
- ersi
- ersic
- ersig
- ersir
- ersj
- erskine
- erskine caldwell
- erskine college
- erskine, ebenezer
- erskine, john
- erskine preston caldwell
- erskine, robert
- erskine, thomas, 1st baron erskine
- ersl
- erslev, kristian
- erslp
- ersm
- ersna
- erso
- ersop
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