ST1-600型闸瓦调整器,当闸瓦间隙过大时,它能自动调整到正常间隙,而闸瓦间隙过小时它不起作用。
参考答案:错
_______ you have got the news about him, I won’t hold it back from you.
A.Even though
B.Now that
C.In case
D.As if
铬钼钢是一种()。
A、高碳钢
B、低碳钢
C、高碳高合金钢
D、低合金钢