第一项始终是图钉的来源。总体可信度是各份资料对上方所用开始和结束时间支持程度的加权平均;资料每比最新的一份旧 180 天,权重减半。
Multiple independent 50th-anniversary retrospectives (Torque[2], epilog.de, autohaus.de[3]) agree the Dudenhofen proving ground opened in April 1966, though none give an exact day.
A 50th-anniversary retrospective states the Dudenhofen proving ground opened in April 1966 as Europe's most modern auto test center.[1]
German trade press independently corroborates the April 1966 opening as part of Dudenhofen’s 50th anniversary coverage.[1]
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