使用者:Firtipap19

出自師大維基

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https://www.tanghaivalve.com/wafer-type-butterfly-valve-th-btv-aw/ - Tanghai Valve is a Professional manufacturer of Wafer type butterfly valve in China. Marine industry, Water supply and drainage, ship building, water treatment

取自「http://history.lib.ntnu.edu.tw/wiki/index.php?title=使用者:Firtipap19&oldid=9022」