2023-03-04
Top hammer type open-pit rock drilling rig with high quality threaded drilling tools T38 T45 T51 Series Threaded Connection Drilling Tool
Make high-quality hydraulic rock drill drill tail-Lianhuashan drilling tool
2023-02-28
Perseverance of gold and stone can be carved, conquer the core key technology, do high-quality hydraulic rock drill drill tail-Lianhuashan drill
High quality taper connection drill products taper column tooth drill bit, taper drill rod
2023-02-16
High quality taper connection drill products taper column tooth drill bit, taper drill rod
High quality thread drilling tool-connecting sleeve
2023-01-19
Lianhuashan drilling tools only make high quality drilling tools
High Power Hydraulic Rock Drill Tail, ST58 Thread
2023-01-16
High-power hydraulic rock drill tail, ST58 thread, length 635mm, matching HL1500 hydraulic rock drill
What are the characteristics of the material of the water seal of the hydraulic rock drill?
2022-12-22
At present, the commonly used water sealing material is polyester polyurethane. This material is characterized by good physical and mechanical properties, but its hydrolytic stability is very poor. The reason is that water has a strong expansion and hydrolysis effect on this polyurethane. The so-called swelling effect refers to the formation of hydrogen bonds between the water and the polar groups in the polyurethane elastomer,
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