pregrouting

例句：

1. 1.This method is commonly used for pre-grouting cracks in concrete structures.
   这种方法常用于混凝土结构中预注浆裂缝。
2. 2.The engineers decided to pre-grouting the joints before pouring the mortar.
   工程师们决定在浇筑砂浆之前先对接缝进行预注浆。
3. 3.Pre-grouting helps to prevent water seepage and improve the durability of the structure.
   预注浆有助于防止水分渗透，并提高结构的耐久性。