近几年来栓焊梁在我国铁路桥梁上有了很大的发展不仅在数量上而且在质量上也有许多改进和提高,很受工厂、施工和运营单位的广大工人和战士的欢迎,中等跨度(48M～112M)的桥梁已基本代替了(?)接梁有一些特大桥梁也采用了栓焊梁。毛主席教导我们:“备战、各荒、为人民,”栓焊梁不仅有制造简单、架设方便、养护省工等优点更重要的是符合战备要求,其构造简单、架梁速度较(?)接梁快,更换,拆除都比较方便 In recent years bolt welding beam in our country railway bridge has made great development not only in quantity but also in quality there are many improvements and improvements, very popular with factories, construction and operation of the majority of workers and soldiers welcome, medium span ( 48M ~ 112M) has been basically replaced the bridge (?) Beam There are some large bridge also used bolt welding beam. Chairman Mao teaches us: “preparing for war, desolation and for the people,” the bolt welding beam not only has the advantages of simple manufacture, convenient installation and labor saving, but also meets the requirements of combat readiness. Its structure is simple and the girder speed is faster (?) Fast beam, replacement, removal are more convenient