procurement of ring hammer made of cast manganese for 7 numbers of ring granulators installed at procurement of ring hammer made of cast manganese for 7 numbers of ring granulators installed at stage i and ii chp mm sgtpp wbpdcl , procurement of ring hammer ( made of cast manganese ) for 7 numbers of ring granulators installed at stage-i & ii chp-mm, sgtpp / wbpdcl , ring hammer -toothed for cr sgtpp1 ring hammer ( toothed ) ; drawing no.wbpdcl / sgtpp / chp / mm / 01 ( 3-273-068 / 3-273-a-068 ) ( moc:mn steel as per is:276-1978, grade-iii, hardness:229 bhn ( max ) , weight:22kg ( approx. ) ; tolerance:+ / -2.0% and all dimension as per drawing, & dimensional tolerance as per is:4897 accuracy class-ii. ) => limited