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
- survey fee
- survey for field and pipeline of gas and oil
- survey for marking of boundary
- survey for water conservancy planning
- survey in Ding County
- surveying
- surveying and mapping administration of land
- Surveying and Mapping Law of the People’s Republic of China
- surveying and mapping of island and reef
- surveying and mapping of remote sensing
- surveying and mapping satellite
- surveying and positionging methods
- surveying astronomy
- surveying for cultural heritage conservation
- surveying for site selection
- surveying for urban-rual planning
- surveying instrument in history of China
- surveying mapping and geoinformation vocational skill appraisal
- surveying mark and markstone
- Surveying Method with Examples
- surveying of land use types
- surveying point of undergroundpipeline
- surveying problem
- surveying setting-out
- surveying the vertical side of building