As a result, a 2-d temperature field model for welding solidification cracking was developed.

在此基础上，建立了二维焊接凝固裂纹温度场计算模型。

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In fact they're beneficial because the building moves thermally more than is caused by the Jubilee Line and the movements concentrated around the cracks and, if they didn't, there'd be cracking elsewhere.

BBC: MPs say no repairs will be done on Big Ben before 2020