bit breakage

基本解释

Not sure what the damage would have been if the spokes were a bit looser, probably more rim damage and less spoke breakage.
不知道什么是破坏本来如果辐条得有点松散，可能是更边缘断裂破坏和少说话。
blog.sina.com.cn
The drill bit is a direct tool for rock breakage. The rate of penetration is closely related with the drill bit as well as the mechanical properties of the rocks.
钻头是直接破碎井底岩石的工具，钻井速度的快慢不仅与钻头有关，而且与所钻岩石的力学性质密切相关。
lib.swpu.edu.cn
It should be pointed out that upgrading the strength of materials to resist multi-shock fatigue is an effective approach to reduce the socket-breakage rate as well as to improve bit's service life.
并指出，提高材料抗多冲疲劳的强度将是减少钎头断裤率，延长其使用寿命的有效途径。