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Cast iron spears became especially prominent in regions where iron smelting technologies were developed. The ability to mass-produce weaponry meant that armies could equip a larger number of soldiers, contributing to the rise and fall of empires. For instance, in Ancient China and Europe, armies equipped with cast iron spears had a tactical advantage due to their durability and adaptability in various combat scenarios.

The most suitable and commonly used grades for windows and doors are 6000 series, which include the following;

This type of finished aluminum often oxidizes with a light white powder the more it is exposed to air and moisture.