SFGJ-2 keep track gauge two casing center distance detector SFGJ-2 ( 3 5 ~ 2000 ) Maintaining gauge two casing center distance detector Function: This instrument can be used to detect the center distance of the pre-embedded casing of WJ7 and WJ8 fastener systems. Technical Parameters: 1 , measuring range: 35-2000 2 , resolution: 0.01 3 , allowable error: ± 0.14 4 , aluminum alloy box size: TGC-1A universal gauge TGC-1C/1E/1F working distance gauge TGC-2A second generation gauge ROG-1/2/3 railway distance ruler SFGP-1 : 40 rail bottom slope SFZH-1 railway combination measuring ruler SFGF-1 rail seam ruler Single piece track feeler / combination feeler / low ruler SFZT-1 platform measuring ruler SFZJ-1 subway special square SFDC-2 ( 1m /2m/3m/4m ) high iron support surface flatness electronic flat ruler Track plate / double block sleeper embedded parts and prestressed anchors SFLJ-2 bearing groove adjacent casing center distance detector SFGJ-2 keep track gauge two casing center distance detector SFNQ-2 double block sleeper relative distortion detector SFHS-2 double block sleeper thickness / depth detection rule SFDJ-2 double block type sleeper detection special large gauge measuring instrument SFXJ-2 double block type sleeper inspection special small gauge measuring instrument SFGW-2 rail thermometer SFGC-3 high - speed railway multi-function digital display gauge SFDC-1/2/3/4 high speed railway support layer surface flatness SFPL-1 pre - embedded casing center line deviation detector Solar Fan,solar electric fan,solar energy fan,outdoor solar fan JIANGMEN ESCLIGHTING TECHNOLOGY LIMITED , https://www.windfansummer.com