“懂王”特朗普重出江湖，二度入主白宫！果不其然，关税大棒重重砸下，给邻国加拿大和墨西哥加了25%的关税，但给中国加了10%！是战略回避，还是暴风雨前的宁静？中国设备商别猜了——无论关税加多少，UL认证才是美国市场的“入场券”！
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