engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Fitter Tools Cutting Tools

General composition of high speed steel (HSS) cutting tool is in the ratio of 18 ∶ 4 ∶ 1. In this ratio, 18 refers to _________. 

1
Chromium 
2
Tungsten 
3
Cobalt 
4
Vanadium 
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