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The structure of tunnel form building is a more popular structural system in European.
模 房屋结构在欧洲是一种比较流行的结构体系。
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To form (a tunnel, for example) by drilling, digging, or burrowing.
用钻、挖或掘的方式打通如。
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To form (a tunnel, for example) by drilling, digging, or burrowing.
用钻、挖或掘的方式打通如。
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