This article introduces four common surface treatments for bolts: coating, hot-dip galvanizing, electroplating, and Dacro. These methods can improve the…
A yayin taron Majalisar Dinkin Duniya karo na 75 a 2020, Kasar Sin ta ba da shawarar cewa “ya kamata a rika fitar da iskar carbon dioxide da sauri 2030 and achieve…