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5 Core Big Thick Wire Diameter 3 3.2 mm 3mm 3.2mm Acid Core and Solid Core Solder Wire for Copper Pipe - China 3mm Solder Wire, 3 mm Solder Wire | Made-in-China.com
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What kind of solder (rosin cored, etc. lead-free)? What is flux and when is it necessary? - Curious Inventor
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