过去，国内生产这些线材都是用来出口的，但在 2009 年开始国内的需求开始暴涨。
The old barges, once used to transport building materials, coal and food from the Port of London, have spent more than 30 years moored in Essex.
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And conversely, if I want to revert the modifications, that’s also possible:
The blocks are linked together to create a history.