Scrape the wax loose with a butter knife (be gentle with Berber carpets; the loops fray easily).
用抹黄油的刀把蜡刮松(刮伯伯尔地毯的时候要轻一点;它的线圈很容易破损)。
The lower part, the conical section of the furnace and other fray easily area are covered with refractory to protect the heating surface.
炉膛下部锥段以下及炉内其它易磨损部位敷设耐火浇筑料,以保护受热面。
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