Three-ring chain, mining ring chain, forging ring chain, welded chain ring chain ring 
 Scope ring chain 
 Material by a three-ring chain forged by nine. Applicable to the transport of coal, gangue, material and other types of harvesters and forest timber transport connection, in line with "coal mine security procedures" under the premise of mine who is also applied to join. 
 Three-ring chain for the province, superior product 
 2. Tricyclic chain Specifications 
 Size Width (mm) arc radius (mm) Weight (kg / set) test load (KN) within the minimum width (mm) maximum external width (mm) 
 22 × 105 40 87 41 2.9 370 15 
 26 × 118 46 102 48 4.6 520 15 
 28 × 120 48 108 51 6.7 610 15 
 30 × 120 48 112 53 7.8 670 15 
 30 × 130 55 119 56. 5 6.9 670 15 
 32 × 140 58 126 60 9.9 790 15