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
- ethnic ghettos
- ethnic group
- ethnic groups map
- ethnic language geography
- Ethnic Language Translation Committee of the Translators Association of China
- Ethnic Library of China
- Ethnic literature of China
- ethnic medicine
- ethnic minority archives
- Ethnic nationalism
- Ethnic Party
- ethnic prejudice
- ethnic residences
- ethnics
- ethnic series maps
- ethnic settlement geography
- ethnic shopping
- ethnic solidarity
- ethnic street
- ethnic theory
- ethnic tourism
- ethnic tourism geography
- ethnic weisuo guard
- ethnobiology
- ethnobotany