就在这时，沈阳铁路局行车调度传达东北铁路交通指挥部命令：19次司机必须保证列车正点到达哈尔滨车站。
O O B-Time I-Time O B-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization O O B-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization O O O B-Time I-Time I-Time B-Person I-Person O O O O B-Thing I-Thing O O O O B-Location I-Location I-Location I-Location I-Location O