cofferdam
noun [ C ] engineering specialized uk/ˈkɒf.ə.dæm/ us/ˈkɑː.fɚ.dæm/
（用于水下工作的）潜水箱，沉箱
a large box filled with air that allows people to work underwater, for example while building bridges
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。