注：DN200以上接头，高圧力、高层建筑使用，管道必须有固定支撑或固定托架，否则产品必须有防拉脱装置(产品实际轴向力〈反支撑力)° 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)