external seal meaning in English
外密封
外装式密封
Examples
- Standard specification for external sealing bands for concrete pipe , manholes , and precast box sections
混凝土管人孔和预制箱形截面用外部密封带的标准规范 - Standard specification for external sealing bands for concrete pipe , manholes , and precast box sections metric
混凝土管人孔和预制箱形截面用外部密封带的标准规范