聲級計/儀產品及廠家
北京wh/sl-5858多功能聲級計公司新聞多功能聲級計標準：gb/t3785，iec651 2型，ansi s1.4 2型功能：sl, leq計權：a, c, linear, filter測量范圍：a計權: 30-130dbc計權: 35-130db線性: 40-125db。
更新時間:2025-06-06
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