' steel in this class is tough, ductile and easily machined. "这种钢强韧, 延展性好,而且容易加工.Shrinkage and dispersed shrinkage are the special waster of ductile iron.缩孔和缩松是球墨铸铁特有的废品现象.The metal is very hard and strong and less ...
苏格兰队在国内最后一场热身赛的对手是波兰队。Poland provide the opposition for the Scots' last warm-up match at home.从国内相关的工会那儿或许能得到一项特许。A special dispensation may be obtained from the domestic union concerned.由于国内市场饱和，各公司开始外销。As the dome...