HT DOOR INTERLOCK COMPLETE KEY FOR AC EARTHING SWITCH TYPE 25. 04 MAKE OF M/ S PATRA & CHANDA, PART NO. PCE/ HIL/ GP. 194/ 001 OR M/ S SECHERON PART NO. LHSG480275P2 OR IKON MAKE TO BE PROCURED FROM AUTHORISED DEALER ALONG WITH TENDER SPECIFIC AUTHORISATION CERTIFICATE.