波兰采购需求：卡尺、千分尺、千分表、指示器、高度尺、量块

I have been experiencing issues with the hardness measurement system. While it consistently shows good results on the standard block that comes with the unit, my samples often yield no readings at all. This discrepancy is puzzling, and I need clarification on what might be causing the lack of results during testing. Could you provide insights into potential reasons for this issue? Additionally, any guidance on how to ensure accurate measurements with my samples would be appreciated. Looking forward to your assistance in resolving this matter.