建筑业对整个国民经济发展起着重要作用。房屋建筑一般占基本建设投资的30～50%左右,但建筑业与其他工业相比还比较落后,生产效率低,周期长,质量不稳定。造成这种情况的原因,主要是建筑业的产品有其特殊性,还存在着大量手工 The construction industry plays an important role in the development of the entire national economy. Housing construction generally accounts for about 30 to 50% of the capital construction investment, but the construction industry is still relatively backward compared to other industries, with low production efficiency, long cycle, and unstable quality. The reason for this is mainly because the products of the construction industry have their own particularities and there is still a lot of manual work.