main construction的用法和样例：
例句
- Throughout the main part of the project each group is asked to maintain a diary of progress made.
在工程的主体施工期间，各组必须保存进度日记。 - The integral steel platform formwork system is a new kind of formwork system to adapt the construction need of super high buildings.
摘要整体钢平台模板体系是适应超高层建筑主体施工需要的新型模板体系，在我国有广泛的应用前景。
