Product Name: Mine supporting seam pipe seam pipe anchor bolt MF33 called "rock friction stabilizer", early seventies developed by Professor Scott successfully by Ingersoll Rand as a patented product, the supply of mining Supporting use. Early eighties, Beijing Institute to build wells in the laboratory seam pipe anchor Discover the test, and achieved good results. After the system gradually promote the use of coal. Seam pipe anchor is highly dedicated support products, advanced materials and other works underground culvert roof support used with the manufacturing process is simple, easy to use, with a strong anchor in the underground shotcrete support, the tensile force, there is a strong expansion force, so that the whole roof to become one. Model MF33 MF40 MF47 head diameter (mm) 28 33 40 tip length (mm) 60 80 70 ring diameter (mm) 6.5 6.5 6.5 tube wall thickness (mm) 2-2.5 2-2.5 2.5-3.0 tube diameter (mm) 334047 Contact: Wu Jingli Mobile: 18653822725 landline :0538-8530018 QQ: 635395409 Fax 0538 -8530316