Composition chimique (%)
Q1 : ?
A1 :,
Q2 : ?
A2: ,.SEP 1921-84 E/e,D/d,C/c.
Q3: ?
A3 : S50C, 1.2311, D2/1.2379, H13/1.2344, CR12MOV, DC53, CR8,...
Q4 : ?
A4: ,!,.