Standard Test Method for dielectric breakdown voltage and dielectric strength of D149 ASTM solid electrical insulating materials at industrial power frequencies.
ASTM D149固体电绝缘材料在工业电源频率下的介电击穿电压和介电强度的试验方法。
Test method for ASTM D149 solid electrical insulating materials at commercial power frequencies the dielectric breakdown voltage and dielectric strength.
ASTM D149固体电绝缘材料在工业电源频率下的介电击穿电压和介电强度的试验方法。
Fly ash and coal gangue were used as main raw materials to roast solid insulating brick.
采用废弃物粉煤灰和煤矸石为主要原料焙烧实心墙体保温砖。
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