vacuum assistance injection

• 真空辅助压浆

vacuum assistance injection的用法和样例：

例句

1. The prestressing duct vacuum grouting workmanship is an effective measure for improving the safety and durability of the post-tensioning concrete structures.
   预应力管道真空辅助压浆工艺是提高后张预应力混凝土结构安全度和耐久性的有效措施。