Abstract : to increase industrial grade silicon product quality , bottom blowing melt of industrial grade silicon outside the furnace can effectively decrease al and ca contents in industrial grade silicon 文摘:为提高工业硅产品质量，采用炉外底吹氧化精炼工业硅熔体，有效地降低了工业硅中铝、钙杂质的含量。
There are only a handful of boots that have their outsoles stitched , cemented , or double / tripple rivited to the upper of the shoes , this would prevent much of the tearing away of the upper from the outsole that is seen today 只有少数的球鞋外底和鞋面之间经过2重或者3重加倍的缝合及加固，而正是这样的工序才能避免现今经常出现的鞋面及鞋底之间开裂的现象。
