Usfd manual correction slip no 4

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Indian Railways and since use of digital B-Scan USFD testing machine has been made This revised version of the manual incorporates Correction Slip No. ADVANCE CORRECTION SLIP No. 94 dated. 01-06-2004. The existing para 410 (3) and 410 (4) of Indian Railway Permanent Way Manual may be modified to read asUSFD MANUAL C/SLIP NO. 4 dtd 16.9.99. (Authority- RDSO letter No.CT/USFD dtd 16.9.99). 1. Existing Para 6.4.2 of the manual may be read as under:. This revised version of the manual incorporates Correction Slip No. 1.1.4 Defects associated with faulty welding i.e. gas pores, lack of fusion,