ZHEJIANG TOSVAL INDUSTRY CO., LTD tau tsim nyob rau xyoo 1980 thaum thawj tiam pib nrog lub npe hu ua Yuhuan Tongxing Valve Co., Ltd, Peb cov khoom lag luam suav nrog ntau txhiab qhov kev qhia tshwj xeeb hauv ntau tshaj 20 series uas suav nrog tooj dag pob valve, Dej ntsuas dej ' , Gas pob valve thiab lub kaum ntse ntse valve, bibcock thiab yeeb fittings, etc. peb lub peev xwm txhua xyoo tso tawm yog li 50 lab pcs.