玩弄少妇秘书人妻系列,欧美人与动交视频在线观看,在线 国产 欧美 亚洲 天堂,高中女无套中出17P

Tungsten Carbide Mining Buttons

Made from high-purity tungsten carbide and premium cobalt, tungsten carbide mining buttons offer a hardness of HRA 88–93. The spherical structure optimizes stress distribution, significantly enhancing service life under high-impact conditions. They are suitable for high-speed, high-pressure rock drilling operations. Common applications include drill bits, cutting picks, anchor rod bits, and tunnel boring machines (TBMs), where they deliver excellent impact resistance and cutting performance.

 

Comments are closed.

Address: 3F, No.25-1 WH Rd., Xiamen Software Park Ⅱ, FJ 361008,China Copyright ? 1997 - 2025 CTIA All Rights Reserved
Phone:+86-592-5129696,+86-592-5129595;    Email: sales@chinatungsten.com
舊版