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
- Donana National Park
- Donan potential
- donate-based crowd-funding
- Donatello
- donation-giving by Tibetan Buddhists
- Donation of Pepin
- donation to school
- Donati's comet
- Donatism
- Donato Bramante
- Don at the Shijing Temple，Chengdu City
- donaxine
- Don Banks
- Don Carlos
- Don Carlos Palanca Memorial Awards for Literature
- Don De Lillo
- Dondogijn Tsebesmid
- Donets coalfield
- dong
- Dong and Jing
- Dong'an Qu
- Dong'an Xian
- Dongba
- dongba dance
- Dongba literature