This second problem "is the construction quality of the building itself - its structure is not completely sound or its materials are not very strong, which is possible," Mr. Ma said.
第二个问题是因为“建筑本身的质量差——可能结构不是很安全，或者材料不结识。”马先生说。
Bridge construction for the professional high technical requirements and construction, because some of the link may negligence, causing the quality problem.
桥梁施工对专业技术要求高，施工时可能因为一些环节的疏忽，就造成质量问题。
For the particularity of construction enterprises, the quality validity of system management of certificated enterprises becomes the universally concerned problem.
由于建筑施工领导特殊性，这些获证的建筑企业质量管理体系的有效性成为了社会各界普遍关心的问题。
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