工学 井下工具 释 shock absorber 减振器 吸收钻井中产生的冲击和振动负荷，保护钻头牙齿、轴承和钻具，提高钻头及其他钻具寿命的工具。
计算机硬件 计算机工程设计 释文 shock absorber 减震器
- final step
- final topology
- final velocity
- final version
- finance
- finance company
- finance,credit,goods and foreign exchange balance
- finance lease
- finance lease system
- finance of revolutionary base areas
- Finance Planning Commission
- finance statistics
- financial account
- financial allocation replaced by bank loan
- Financial Analysis
- financial analysis
- financial analysis of construction project
- financial arrangements of public pension system
- financial asset
- financial assets investment
- financial assets management system
- financial big data
- financial big data modeling
- financial bill management
- financial bond