ductility tester of petroleum asphalt

例句：

1. 1.The ductility tester is used to measure the flexibility of asphalt.
   柔度试验器用于测量沥青的柔韧性。
2. 2.The manufacturer provides a detailed guide on how to use the ductility tester.
   制造商提供了一份详细的指南，说明如何使用柔度试验器。
3. 3. The ductility tester was designed to ensure the quality of petroleum asphalt.
   柔度试验器的设计旨在确保石油沥青的质量。