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func (opt *Option) ArgUint64Var(val *uint64) error
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36氪获悉，近日，“怀芯声学”完成数千万元天使轮融资，本轮由创势资本领投。该公司以声学大数据和人工智能技术解决精准异常预警和健康度分析为发展核心，业务涵盖地下管网漏损检测、安防应急、工业设施设备诊断等领域。公司方面表示本轮融资后将延伸至医疗、消费电子等业务。
For example, 5 points all fitting in an arc covering 1/31/31/3 of the circumference: 5×(1/3)4=5/81≈6.2%5 \times (1/3)^4 = 5/81 \approx 6.2\%5×(1/3)4=5/81≈6.2%.