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船只的清洗工作是一项烦重的体力劳动,一名工人忙碌一小时也清洗不完0.5平方米钢制甲板。最近,民主德国罗斯托克造船公司的专家们研制出一种船只清洗机,它每小时可清洗
The cleaning of the vessel was a heavy manual labor and a worker washes an hour’s steel plate of 0.5 square meters. Recently, experts from the German Rostock shipbuilding company in Democracy developed a ship washing machine which can be washed every hour