polyurea的用法和样例：
例句
- The characteristics of special polyurea grease for motor bearing and its application effects are analysed and discussed.
对电机轴承专用聚脲基脂的特点及其在电机轴承上的应用效果进行了分析和探讨。 - Development history and popularization situation of technology of spraying polyurea elastomer are focused.
重点介绍了喷涂聚脲弹性体技术的发展进程和推广普及情况。
