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　　NJ-4000型混凝土電阻率檢測(cè)儀檢測(cè)原理利用Wenner陣列傳感器（50mm的間距）測(cè)試混凝土電阻率，所測(cè)的電阻率以kΩ?cm為單位的 		2022-08-12
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全自動(dòng)骨料反應(yīng)試驗(yàn)箱產(chǎn)品概述本產(chǎn)品按標(biāo)準(zhǔn)DL/T《水工混凝土砂石骨料試驗(yàn)規(guī)程》要求設(shè)計(jì)制造。選用于作砂石骨料膨脹檢測(cè)時(shí)控溫、 		2022-08-12
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