Tungsten carbide drill bits are a type of cemented carbide drill bit, mainly made of sintered tungsten carbide and cobalt. They possess extremely high hardness and wear resistance, and are widely used for machining high-hardness materials such as stainless steel and cast iron.

Split anchor bolts are a new type of anchoring component used in geotechnical engineering support, primarily for reinforcing surrounding rock in tunnels, slopes, and foundation pits. Their core feature is the radial expansion of the anchoring section within the borehole using mechanical or hydraulic methods, forming a "split" anchoring structure. This results in stronger interlocking and frictional forces with the surrounding rock, enhancing the support effect.

Split anchor bolts are a new type of anchoring component used in geotechnical engineering support, primarily for reinforcing surrounding rock in tunnels, slopes, and foundation pits. Their core feature is the radial expansion of the anchoring section within the borehole using mechanical or hydraulic methods, forming a "split" anchoring structure. This results in stronger interlocking and frictional forces with the surrounding rock, enhancing the support effect.

Split anchor bolts are a new type of anchoring component used in geotechnical engineering support, primarily for reinforcing surrounding rock in tunnels, slopes, and foundation pits. Their core feature is the radial expansion of the anchoring section within the borehole using mechanical or hydraulic methods, forming a "split" anchoring structure. This results in stronger interlocking and frictional forces with the surrounding rock, enhancing the support effect.

Pre-supporting small guide pipes are a technique used in tunnel excavation, mainly for pre-supporting sections with short self-stabilization time, such as weak and fractured zones, shallow buried sections, tunnel entrance biased sections, sand layers, gravel sections, and fault fracture zones.

Rigid sleeves, also known as rigid waterproof sleeves, are constructed from A3 steel or stainless steel pipes with welded water-stop rings. The space between the sleeve and the pipe is sealed with rigid material, and there are no internal shock-absorbing components.