主要用于樹(shù)脂砂造型中,用于排出澆鑄時(shí)泥芯中排放出來(lái)的氣體,防止鑄件產(chǎn)生氣孔鑄造用通氣管批發(fā) 首選貝森特---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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