北京快乐8怎么买最划算

  •  <b> box type resistance furnace </b>
    Box type resistance furnace

    Box type resistance furnace is a common form of electric furnace. It is divided into vertical, horizontal, split and integral. The temperature section is divided into 1200 degrees below, 1400 degrees, 1600 degrees, 1700 degrees, 1800 degrees, etc., respectively, with resistance wire, silicon carbide rod, silicon molybdenum rod as heating element. [detailed]

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