The rock bolt for superspeed hardening agent sandwich cement cartridge is a simple and valid rock bolt as a support.

超快硬夹心水泥卷锚杆是一种简单有效的支护锚杆。

MDP 952 agent for profile control and water plugging is a mixture consisted of xylolite flour, hardening agent and some chemicals.

MDP-952调堵剂是由菱苦土粉与硬化剂及一些化学助剂组成的混合物。