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
- farm household management
- farm house mortgage loan
- farming and reading culture
- Farming and Weaving Pictures
- Farming Books, Calligraphy and Calligraphy
- farming haozi
- farming radius
- farming season prediction
- farming song
- farming system
- Farmington Plan
- Farmington River
- farming vacation
- farm irrigation and drainage system
- farmland desertification
- farmland drainage experiment
- farmland drainage system
- farmland drainage system design
- farmlanddrainage system planning
- farmland eco-economic system
- farmland environmental quality monitoring
- farmland fertility monitoring
- farmland improving machine
- farmland infrastructure
- farmland irrigation and drainage