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If you're one of those people who, whenever 3D printing is mentioned, thinks, "How the heck does that work?", then we suggest you look away now. 如果你对3D总是感到不可思议“这怎么可能？”，那么还是不要看这篇文章了。 Still here? Well, don't say we didn't warn you because your mind is about to be totally blown by what we're going to say next: someone has 3D printed a bridge that can take the weight of 40 trucks. 亲爱的读者朋友还在吗？我们已经提醒过咯，接下来你的想法将被彻底颠覆：有人用3D打印技术造了一条桥，能承载40辆卡车的重量。 | 
