Tender For supply of procurement of gear box assembly set suitable for elb (rdso spn. no. rdso/spn/208/2012 version 2.0 or latest) with clutch stage combination helical & worm wheel gear drive with hard crank insert internal locking feature, oil filled & sealed type unit with connecting link on output shaft suitable for g.i. boom barrier. drg. no. s&t/mft/6000/adv.1. etc.