Hong Kong – Dutch chip-equipment giant ASML Holding is contending with its biggest challenge yet under the Trump administration: In a series of recent meetings, Commerce Secretary Howard Lutnick outlined concerns to ASML’s senior leaders that one of its top-of-the-line machines may have made its way into China, in violation of US-led export restrictions.In the meetings, Lutnick expressed concern to ASML executives over the company’s extreme ultraviolet lithography, or EUV, machines, according to people familiar with the talks. EUV systems are used by firms such as Taiwan Semiconductor Manufacturing Co. to manufacture processors for the likes of Nvidia and Apple,…