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箱型结构的主梁，内腔无法涂漆防锈蚀，为了防止水汽侵入腐蚀主梁内腔，必须保住主梁内腔的密封性。
The box type structure, cavity cannot antirust paint corrosion, in order to prevent moisture intrusion corrosion beam cavity, sealing the inner cavity of the main girder must keep.
然而2015年，亚利桑那州的双语新闻主播瓦妮莎·鲁伊斯因为在英语电视节目上用西语腔读出西语词而受到公开的批评。
Yet in 2015, Vanessa Ruiz, a bilingual news anchor in Arizona, was loudly criticized for pronouncing Spanish words with a Spanish accent on English-language television.
其目的是当熔化金属凝固和收缩时往型腔里补充熔化金属，从而防止在主铸件中产生孔隙。
The purpose of this is to feed the molten metal to the mold cavity as the molten metal solidifies and shrinks, and thereby prevents voids in the main casting.
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