English to French Other Metallurgy / Casting

How would you say this expression in French?
Système de chalumeau..../d'arc....????
Context : Welding

Text : The FP18 features Firepower's(r) pilot arc/drag torch system which allows you to cut rusted, painted or coated surfaces, without the need for prior surface preparation and it lets you cut grates, chain link and perforated steel without restarting the torch.

thanks for your help