简介了空气锤锤砧锤模联接方式改进前后的使用状况。
The experience of pile hole drilling using pneumatic hammer in bridge construction is reviewed. Equipments, tools and techniques are also described in detail.文中回顾了在建桥工程中,应用风动潜孔锤钻进桥桩桩孔的经验,具体介绍了使用的设备、工具及施工工艺技术。
The upsetting test of metal powder sintered preform by blow speed of the hydraulic press, crank press, pneumatic hammer and high energy rate forging hammer was reported.研究了用液压机、曲柄压力机、空气锤及高速锤的打击速度对粉末冶金烧结体进行的镦粗试验。