... : 1:ISO9001,CRCC 2:PATENT LB600 type electric double wrench:1:ISO9001,CRCC2:PATENT Our company is a leading ... machine, track lifting and lining machine, railway ballast tamper, railway bolt wrench, rail bender , rail gap adjuster, cutting disc, grinding stone ... a very high reputation LB600 type electric double wrench Application:Suitable for railway line sleeper bolt and nut of unscrew and fastening ...