Kedu ihe bụ onye nrụpụta stampụ? Usoro ọrụ: N'ezie, onye na-emepụta stampụ bụ ụlọ ọrụ pụrụ iche ebe a na-emepụta akụkụ dị iche iche site na iji usoro stampụ. Ọtụtụ ọla, gụnyere ígwè, aluminum, gold, na ọkaibe alloys, nwere ike iji maka stampụ. Kedu ihe m...
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