... parameter: 1.ISO9001 2.PATENT 3.CRCC4.The special wrench for Brazil Our company is a leading manufacturer specialized in ... , track lifting and lining machine, railway ballast tamper, railway bolt wrench, rail bender , rail gap adjuster, cutting disc, grinding stone, ... & dismounting the elastic fastening on the railway track. With double top head, it can install two pieces of elastic fastenings ...