... metal-sheathed insulation 金属护套保温 metal-to-metal seal 金属-金属密封圈 metalwork 金工；金属制品 ...
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Fire Safe - Secondary metal-to-metal seal ACTS as backup if primary seal is destroyed by fire.
防火安全-如果第一个密封被火烧坏，则第二个金属对金属密封作为后备密封发挥作用。
Valves feature as standard secondary metal-to-metal seal in the event of the primary seat being destroyed by fire.
作为标准配置，阀门具有第二个金属对金属密封，以防万一第一个密封被火毁坏。
It has a high integrity metal to metal body bonnet seal suitable for high pressure use.
高精密度的金属阀体与阀盖密封以适合压的工作要求。
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