... various railway maintenance equipments in China.. Products include rail cutter, rail grinder, rail drilling machine, track lifting and lining machine, ... railway ballast tamper, railway bolt wrench, rail bender , rail gap adjuster, cutting disc, grinding stone, and etc ... 2008 ISO 9001:2008 international standards.HGA-400 Hydraulic Rail Gap Regulator is suitable for 43kg--75kg rails. ...