低温轧制的优点?
参考答案:
低温轧制的优点:
(1)在加热工序节省了能耗
(2)减少了氧化烧损;
(3)减少了轧辊由于热应力引起的疲劳裂纹;
(4)减少了氧化铁皮对轧辊的磨损。
"Middleman" in the passage almost equals to all the following in meaning EXCEPT ______.
A.go-between
B.intermediary
C.manufacturer
D.wholesaler
碳酸盐硬度表示()。