TY - GEN ED - BUREAU OF CEYLON STANDARDS TI - SLS : 415 : 1977 : Specification for mild steel filler rods for manual gas welding PY - 1977/// CY - Colombo PB - BUREAU OF CEYLON STANDARDS KW - a621.791.042:621.791.5 KW - SRI LANKA-STANDARDS KW - STANDARDS-SRI LANKA N1 - STD2604 ER -