Theknoloji e tsoetseng pele ea tlhahiso ea machaba le boleng bo phahameng
Zhejiang Standard Valve Co., Ltd. (eo ka mor'a moo e bitsoang STA) ke k'hamphani e sebetsanang ka ho khetheha le tlhahiso ea li-valve, liphaephe, HVAC le lihlahisoa tse ling.E thehiloe ka 1984, k'hamphani e fumaneha Yuhuan City, Profinseng ea Zhejiang, motse-moholo oa li-valve.Kamora lilemo tse 40 tsa nts'etsopele le kholo, e fetohile e 'ngoe ea lihlahisoa tse tsebahalang indastering e le' ngoe.