模型介绍

 <SPAn style="color: rgb(68, 68, 68); font-family: Arial, "microsoft yahei"; font-size: 14px; text-align: justify; text-indent: 28px;"> SPAn><SPAn style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin: 0px; padding: 0px; word-wrap: break-word; color: rgb(68, 68, 68); font-family: Arial, "microsoft yahei"; font-size: 14px; text-align: justify; text-indent: 28px;">石桥，即用石料建造的桥梁。有石梁桥和石拱桥，历史悠久。但由于石梁抗弯能力较差，现已只能在人行桥或涵洞中使用。易图网为您提供下载服务，好看实用。SPAn>