supply of engineering itemengineering item,spring setting device, (tws) drg. no. t-6216 [ warranty period: 30 months after the d ate of delivery ] ] , slide chair for thick web switches 1 in 12 60 kg drg. no. t-6166 [ warranty pe riod: 30 months after the date of delivery ] ] , fitting for tws 1 in 12 60 kg of one set wedge t-6305a-02 nos [ warranty period: 30 months after the date of delivery ] ] , fitting for tws 1 in 12 60 kg of . wedge t-6305-34 nos [ warranty period: 30 months after the date of delivery ] ] , leaf spring t-6310 for thick web switch. [ warranty period: 30 months after the date of delivery ] ]