Built in 1750, the Suomenlinna shipyard is a UNESCO World Heritage site that still has two active dry docks. The shipyard is part of the Suomenlinna Sea...
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寒冷的冬季,加拿大魁北克地区进入酷寒时节,温度往往达到零下 25 摄氏度。在最冷的几个月里, Union Quarry 的初级处理池遇到了问题,因为水泵电缆和泵管不断破裂。多亏有了能防止结冰的飞力 4680 潜水搅拌机,这个问题现已得到了解决。 Union Quarry...
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