Bahot Bura haal hai.
Train me kadam rakhna ki jagah hi nhi hai.
Copper ke wire honge to railways lut jaayegi.ЁЯШВ
Copper bahot expensive metal hai.
Ye ek alloy hota hai, high conductivity ka jisme...
more... copper ka 5 percent by weight hota hai index.
Vaishali at Moradabad.