比火更热的是奉献之心

Beijing (Chinese) - - CONTENTS -

繁华城市的地下,天然气在管道中奔涌,为人们的生活带来舒适便利。而磨损严重的老旧管线,隐藏着不易察觉的隐患。寻找并弥补这些隐患,靠的就是孙德芝和同事们手中的焊枪

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