性爱无码高清电影|亚洲第一播放器|国产精品日日摸夜夜摸添孕妇|日本在线不卡免费|日韩A片大全在线观看|国产精品Av在线观看|欧美日韩另类一级二级|国产一区二区三区高清无码|成人网站在线观看视频|TS女神第一福利视频

1.    The strip steel should be annealed. The surface roughness should be 6.3μm.

2.    The powder particle size should be approximately 0.25mm;

3.    The cored wire should have compositions. Calcium content in silicon calcium cored wire should be higher than 28%;

4.    Powder weight error should not be more than the stated limit.

5.    Cored wire hasp should be compact with no powder leakage in the process of wire feeding;

6.    Weight and total length of the cored wire and weight of iron plate should be marked;

7.    The powder should be dry with less than 0.5% of water content. 

• [Editor:張德眾]