polyurea的用法和樣例：
例句
- The characteristics of special polyurea grease for motor bearing and its application effects are analysed and discussed.
對電機軸承專用聚脲基脂的特點及其在電機軸承上的應用效果進行了分析和探討。 - Development history and popularization situation of technology of spraying polyurea elastomer are focused.
重點介紹了噴塗聚脲彈性體技術的發展進程和推廣普及情況。
