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Massive machines require engineering extremes. The massive man-made satellite, commonly known as the International Space Station, hurtling around the Earth at 27,600 km an hour, has been a temporary home for humans for the last 20 years. The biggest land vehicle on earth, a bucket excavator titled Bagger 293, that can move 240,000 cubic meters of dirt each day. Innovation has a...。分“英雄”“智者”“会盟”和“统一”四集，再现了公元13世纪中期，阔端和萨迦班智达这两位杰出人物在凉州进行的一次具有深远历史影响、后被称为“凉州会盟”的和平会谈的历史过程。。