You guys, I don't understand.Products from various countries have many interfaces, and I have just joined a supplier of plastic protection products for sale. In too many countries are not very clear, their standard, if can give me some information, such as the European standard + corresponding English, I think there will be a great help to me, not very understanding can also answer, hope can learn about. Thank you。
Or do you have to turn over every now and then?. Thread knowledge, personal feeling is quite complicated.
The world's three major thread standards, individuals feel very good, although six or seven years of work
For thread purposes, you are recommended to study the metric, American and American thread standards manual
