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注：DN200以上接頭，高圧力、高層建筑使用，管道必須有固定支撐或固定托架，否則產(chǎn)品必須有防拉脫裝置(產(chǎn)品實(shí)際軸向力〈反支撐力)° Note: The joints above DN200 used in high pressure and high building, anti-pull-off device should be installed if the pipe has no fixed stay or fixed bracket (actual axial force of the product is less than anti-supporting force)