diy tractor make mini Concrete Bridge science project | how to make tractor trolley

diy tractor make mini Concrete Bridge science project | how to make tractor trolley Watch more: The video features a DIY project where a mini tractor is used to build a concrete bridge as part of a science project. It also demonstrates how to make a tractor trolley, highlighting creativity and new technology in construction. #constructionmachine #miniconstruction #diytractor #diy #diytractor #minihouse #constructionmachine #miniconstruction #HPMini .