CAUTION: Do not use any sharp tools such as a crowbar or screwdriver on the rubber during installation. Sharp instruments can damage the flange face and cause possible leakage.

• 警告：在安装期间，不要采用任何尖锐的工具，如：撬棍或螺丝刀等。尖锐的工具可能会损伤法兰面，从而可能导致泄露。