calling of service engineer from rexroth-service partner of rexroth for inspection- servicing of hydraulic power pack system of rexroth make for hm gates - teesta v power station . , service charges for deputing 01 service engineer for inspection/ advice for maintenance of hydraulic system/ component ad detailed in the scope of work . ( total 3 visit required during the period of 01 year contract , with each visit shall comprise of 05 days including 02 days journey . out of these 03 visits , 02 visits are mandatory and balance 01 visit is optional , will be carried out based on necessity/ requirement at site ) , to & fro travelling cost from kolkata to njp , shall be paid as per actual of 2nd ac train fare/ lower , against submission of documentary evidence only .