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焕新Model Y一体压铸后底板
70个零件合而为一更结实
屈服强度最高1,700MPa的马氏体钢
与底板之间通过激光深熔焊焊接️
吸收冲击，大大延长车身结构疲劳寿命
制造工艺不是成本妥协项，而是安全护城河
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