基于光衍射原理的API产品，通过激光测量头发宽度，提供便捷计算器及视频解释，用户无需复杂计算即可了解物理现象。
{
"purchaseCount": 0,
"pv": 9,
"globalHotValue": 1,
"updateDt": 1766340099991,
"hotValue": 0.4,
"todayChainPv": 0,
"todayGlobalPv": 1,
"americaHotValueDouble": 1,
"globalHotValueDouble": 1,
"todayAmericaPv": 1,
"americaHotValue": 1,
"selectedValueDouble": 691,
"chinaHotValueDouble": 0,
"selectedValue": 691,
"chinaHotValue": 0,
"hotValueDouble": 0.4
}
