Instruction: Evaluate each product title in the given list, assess its relevance to the given query, and then arrange the products in descending order of relevance, with the most relevant product at the top of the ranked list.

Input:
Query: handheld laser welding machine
Product list:
A: LOTOS MIG175 175AMP Mig Welder with Free Spool Gun, Mask, Aluminum Welding Wires, Solid Wires, Argon Regulator, Standard MIG Gun, Brown
B: Compact Laser Engraver machine, LaserPecker Pro Portable Engraver Lazer Engraving Etcher Desktop Laser Cutter Printer with Auto-focus stand for DIY Logo Design, Art Craft, Wood Paper Leather Food
Answer: A,B