计算题:焊条电弧焊时,焊缝成形系数,测得焊缝宽度为5mm,求焊缝的计算厚度H?
参考答案:
给下列图片选出相应的句子。
1. ( ) 2. ( ) 3. ( ) 4. ( ) 5. ( )
A. First, dig the soil and put the seeds in the soil.
B. We can see the corn.
C. We can see the sprout.
D. We can see a big plant.
E. Water it.
架空电力线路上常用的裸绞线有哪些种类?各有什么特点?