The preparation method comprises the following steps of: digging the plurality of holes on the heat-resisting insulating thin plate supporter and covering the conducting net on each hole;
制备方法为：在耐高温绝缘薄板支撑体上挖多个孔洞并覆盖一个导电网；
The preparation method comprises the following steps of: digging the plurality of holes on the heat-resisting insulating thin plate supporter and covering the conducting net on each hole;
制备方法为：在耐高温绝缘薄板支撑体上挖多个孔洞并覆盖一个导电网；
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