чичиргээ доргиурт нунтаглах тээрмийн үнэ
Alum чулуун цохилт. Rowland Hill Wikipedia Sir Rowland Hill KCB FRS 3 December 179527 August 1879 was an English teacher inventor and social reformer He campaigned for a comprehensive reform of the postal system based on the concept of Uniform Penny Post and his solution of prepayment facilitating the safe speedy and cheap transfer of letters