究其原因，是对扣件式钢管模板支架系统缺乏深入的研究和认识。
A reason is that the comprehensive study and understanding of coupler-style steel tubular formwork supports system has still not be built.
究其原因，是对扣件式钢管模板支架系统缺乏深入的研究和认识。
A reason is that the comprehensive study and understanding of coupler-style steel tubular formwork supports system has still not be built.
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