U.S. demands that chipmaking giant ASML stop servicing some equipment it has sold to Chinese customers are a diplomatic and business headache for the Dutch government, but signs are it will continue to align with Washington on export restrictions. Although Prime Minister Mark Rutte's government is reluctant to make a blanket decision, its public statements and national security interests suggest it will be slow to approve Chinese maintenance requests in future and quick to deny them. That would be a setback for China's attempts to build up its domestic chip industry, because ASML gear is almost impossible to replace and will break down over time if not maintained.