span clearance的意思|示意
                        
                          美 / spæn ˈkliərəns /
                          
                        
                          英 / spæn ˈklɪrəns /
                          
                      
                      跨度净空
span clearance相关短语
1、 clearance of span 桥下净空
span clearance相关例句
We decide the cross and span clearance by over-voltage times and electrical insulation strength (air spacing) from the system major in places that the public not easy to arrive.
再根据系统确定的操作过电压倍数及电气绝缘强度(空气间隙)来确定在人不宜到达地方的交叉跨越距离;