如果钢是用在使用融雪剂的道路隧道桥或立交桥之下的城市桥梁。
If the steel is used for a low urban-area bridge or overpass that creates a tunnel-like configuration over a road on which deicing salt is used.
融雪剂是清除道路积雪的有效方法，而氯盐类融雪剂是目前使用最多的一类融雪剂产品。
This was a good way, using snow thaw agent to clean out snow in the road, and the deicing salt which was made of chloride was mostly used at present.
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