NF A81-362
NF A81-362 (Welding, soldering, brazing, braze-welding. Filler metals for soldering, brazing and braze-welding. Classification, coding, acceptance testing)· AFNOR NF (法国) · 46 种材料
NF A81-362 (Welding, soldering, brazing, braze-welding. Filler metals for soldering, brazing and braze-welding. Classification, coding, acceptance testing)· AFNOR NF (法国) · 46 种材料