1. 净跨径：桥梁净跨径(clear span)一般用L0表示. 对于设支座的桥梁为相邻两墩、台身顶内缘之间的水平净距;对于不设支座的桥梁(如拱桥、刚构桥等)为上、下部结构相交处内缘间的水平净距.
2. 净跨距：clear space 净空间 | clear span 净跨距 | clear width 净阔度
3. 净跨：clear overflow weir 苗吝 | clear span 净跨 | clear water 净水
4. 脏跨：洁距 clear distance | 脏跨 clear span | 截面尺寸 sectional dimension
1. In most cases they have to clear their debt in about five years, compared with a repayment span as long as 15 years in developed countries.