針型閥產(chǎn)品及廠家
聲校準(zhǔn)器是一種能在一個(gè)或幾個(gè)頻率點(diǎn)上產(chǎn)品一個(gè)或幾個(gè)恒定聲壓的標(biāo)準(zhǔn)聲源，用于校準(zhǔn)測(cè)試傳聲器、聲級(jí)計(jì)及其它聲學(xué)測(cè)量?jī)x器的聲壓靈敏度。聲校準(zhǔn)器的度等級(jí)分為ls級(jí)、1級(jí)、2級(jí)，ls級(jí)一般只在實(shí)驗(yàn)室使用，而1級(jí)
更新時(shí)間:2025-09-02
analytik jena tl-2000紫外交聯(lián)儀（組合型）的產(chǎn)品特點(diǎn)1.利用cl-1000紫外交聯(lián)儀和m-20e 紫外透射儀的組合2.采用302nm中波uv的組合型紫外交
更新時(shí)間:2025-09-02
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