我国现有90余万公里公路和13万3千余座总延长3790多公里的桥梁,它们在全国的交通运输中起了重要的作用。在“四化”的宏伟建设计划中还要修建许多公路和许多桥梁。为了保证交通运输畅通,还应该重视现有公路、桥梁的作用,加强对现有公路、桥梁的维修养护。因此,公路、桥梁的检查是 Our country now has more than 90 million kilometers of roads and over 133,000 bridges, which have a total extension of more than 3,790 kilometers. They play an important role in the transportation throughout the country. Many roads and bridges are also to be built in the magnificent project of “four modernizations.” In order to ensure the smooth flow of traffic and transportation, we should also attach importance to the role of existing roads and bridges and strengthen the maintenance and repair of existing roads and bridges. Therefore, highway, bridge inspection is