The experiment show that wire extension and arc length can influence the stabilization of welding process and the welding-seam modeling when using fuzzy-expert system .

试验中发现，采用模糊专家控制系统对焊接过程进行闭环控制时，焊丝干伸长及电弧弧长对焊接过程稳定性和焊缝成型有重要影响。

youdao

People don't realize that lead is all over their homes in a wide variety of products, particularly in things like extension cords and wire and cable, your holiday string lights when you're stringing them up this year, you'll probably see a warning label that says that the product contains lead, known to be a toxic chemical in the state of California.

NPR: Do Home Lead-Testing Kits Work?