塑炼的工艺参数？
参考答案：塑炼的工艺参数：主要因素有辊温、时间、辊距、速比、装胶量。
The book is said to be a special one, which ________ many events not found in other history books. [ ]
A. prints
B. covers
C. refers
D. reads
普通平键轴槽长度公差用H14。
