What does WM stamped on a ring mean?

The letters "WM" stamped on a ring typically stand for "Wolfram" or "Tungsten Carbide." Tungsten carbide, also known as "carbide," is a hard metal alloy that is often used in jewelry, particularly for wedding bands and other durable pieces. It is prized for its scratch resistance, durability, and weight. The "WM" stamp confirms that the ring is made of tungsten carbide.

Why might knowledge of the compass have allowed Chinese to be worlds greatest sea power st one time?

The capital city of China under the leadership Kublai Khan was .?

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