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
- Beihai master plan
- Beihai Shade Hou
- Beihai Shi
- Beihai White Robe General
- Beihai White Tower
- Beihai Yintan
- Beihan
- Beihang
- Beihang University
- Bei Hanting
- Beihuangcheng Dao
- Bei Huifeng
- Beihu Qu
- Beijerinck crater
- Bei Jiang
- Beijiang levee
- Beijiang's Poetry Remarks
- Beijiao Town, Shunde
- Beiji Cun
- Beijing Academy of Art
- Beijing Air and Space Museum
- Beijing Alliance PKU Management Consultants Ltd.
- Beijing Ancient Architecture Museum
- Beijing Ancient Observatory
- Beijingaoyun