经改良的铬钒阀弹簧级钢丝: standard specification for steel wire modified chromium vanadium valve spring quality
屋: 名词1.(房子) house 短语和例子茅屋 hut; 书屋 studio; study; bookshop; 爱屋及乌 love for a person extends even to the crows on his roof; love me, love my dog2.(屋子) room 短语和例子三间屋 three rooms3.(姓氏) a surname 短