Tender for Supply Of Standard Test Block For Rockwell Hardness R Scale (hrr) Range 90-110 Dia 50mm (min) With Test Certificate And Poldi Test Bar Size: 11 X 11 X 150 Mm Hardness Range: 180 - 260 Hbw And 270 - 340 Hbw With Test Certificate (each Range 1 No.) in Kharagpur - West Bengal

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