ballast space
常见例句
- Before entering an enclosed space such as ballast tank, what action will you take?
在進入封閉空間前，（如壓載水艙）應作什麽準備工作？
blog.sina.com.cn - Pumping means are immersed in the ballast 4 to ensure the extraction of water and to cause the vertical shifting of the building in the out position for interaction with the surrounding space.
泵送裝置浸沒在壓載物4中以確保水被抽出，以及使処於與周圍空間相互作用的外部位置的建築物竪直移動。 返回 ballast space