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尽管许多国家的铁路管理部门在不断发展电力牵引,但是内燃牵引同以前一样,仍占有重要地位。目前,世界上约有50％的铁路管理局尚没有电力牵引,并且在具有电力牵引的铁路局,内燃牵引的部分往往并不是不重要的。1985年初,民主德国国家铁路干线作业中内燃牵引比例达67％,调车作业中内燃牵引约达95％;对于保加利亚国铁,相应的比例约为45％和90％。因为在最近数年间,电力牵引的
Although railway administrations in many countries are continually developing electric traction, internal combustion traction still plays an important role as before. At present, about 50% of the world’s railway administrations do not yet have traction and in the case of electrically-powered railways, the portion of internal combustion traction is often not insignificant. In early 1985, the proportion of internal combustion traction in the operation of the national railroad in the Democratic Republic of Germany reached 67% and the internal combustion traction in shunting operations was about 95%. For the Bulgarian National Railways, the corresponding proportions were about 45% and 90%. Because in recent years, electric traction