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Warning: fclose() expects parameter 1 to be resource, bool given in /www/wwwroot/www.wendadaohang.com/inc/function.php on line 2475 急!管道施工时,用了槽钢支护,3米长的槽钢,支护长度10米,基坑1.6米,请问这个槽钢支护的工程量怎么计算? - 66问答网