These valves shall have ptfe seats and fpm seals for maximum service life and protection against external leakage 这些阀门应该配置聚四氟乙烯阀座和fpm密封，使其使用寿命更长，更有助于防止外泄漏。
2.
The custom attribute reflection model could leak instances of user - defined types outside the assembly in which the type is defined 自定义属性反射模型可能会在定义类型的程序集外泄漏用户定义类型的实例。
3.
Valves shall have glassfilled ptfe seals for positive shut - off and extended service - life and fpm seals for maximum protection against external leaks 这些阀门应该配置玻璃填充聚四氟乙烯密封，关闭更灵活，使用寿命更长， fpm密封能够更好的防止外泄漏。
4.
Valves shall have glass - filled ptfe seals for positive shut - off and extended service - life and fpm seals for maximum protection against external leakage 这种阀门应该配置玻璃填充聚四氟乙烯密封，关闭更加灵活，使用寿命更长， fpm密封能够更好的防止外泄漏。
