Nge-28 kaDisemba, i-2020 iNgxelo yeVeki ye-Urea

Ngoku eyona mveliso ingundoqo ye-urea kwisithili sase-Shandong ngo-1810 (iitoni zexabiso, ngokufanayo emva koku), indawo ye-Linyi ishishini lesichumiso se-urea ngexabiso le-1810-1820, i-hebei ye-urea yexabiso le-urea eliqhelekileyo yi-1830, inikezela uzinzo lwexeshana, ukukhawuleza kwangaphambili. I-odolo ayinayo, kwaye inike ingqwalaselo esezantsi ecaleni, ukurhweba okukhanyayo okubini, ukuvala kancinci, amashishini aqala ukuzinza, ngenxa yobonelelo lwamva nje lweperipheral luncinci, ikowuti yefektri izinzile; i-urea kwindawo ye-Henan yi-1810-1820, kwaye isicatshulwa sinyuswe kancinane.Indawo yaseShanxi i-urea isicatshulwa somzimveliso we-1740, i-1780 i-particle enkulu.Isicatshulwa somzimveliso we-urea e-Anhui yi-1800, kwaye isicatshulwa sizinzile okwethutyana.Iintengiselwano eziphezulu zibhekiselele kwi-1890. Ukusebenza kwemfuno yeemarike ezijikelezileyo kuqhelekileyo, kuphela imfuno yemizi-mveliso ifanelekile ukuthatha iimpahla, kodwa ubuninzi be-inventory yeefektri ezininzi zincinci, ngoko uqikelelo lunokuzinza okwethutyana ubuncinane.Ummandla weJiangsu urea mainstream factory quotation 1940.