A . 切缘2.0~2.5mm,唇侧1.5mm,舌侧1.0mmB . 切缘1.5~2.0mm,唇侧1.0mm,舌侧0.5~1.0mmC . 切缘2.0~2.5mm,唇侧1.0mm,舌侧0.5~1.0mmD . 切缘1.5~2.0mm,唇侧1.5mm,舌侧0~1.0mmE . 切缘1.5~2.0mm,唇侧1.0mm,舌侧1.5mm
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