当第一台崭新的国产内燃机车开进三棵树机务段，机务段就像过大年一样热闹，职工和家属们围着这台新型内燃机车，看看这儿，摸摸那儿，又说又笑，大家高兴的合不拢嘴，久久不愿意离开。
O O O O O O O O O B-Thing I-Thing I-Thing I-Thing O O B-Organization I-Organization I-Organization I-Organization I-Organization I-Organization O B-Organization I-Organization I-Organization O O O O O O O O O O B-Person I-Person O B-Person I-Person I-Person O O O O O O B-Thing B-Person I-Person I-Person O O O B-Location I-Location O O O O O O O O O O O B-Person I-Person O O O O O O O O O O O O O O O O