短語詞組短語water -ballast roller 水鎮(zhèn)重路碾bag -water ballast 壓艙水袋Draft - Water Ballast 吃水深度variable -ballast water 可變壓載水Water ballast tank tar -epoxy 柏油環(huán)氧基樹脂合成貯水桶 返回 water-ballast