1)primary pure water system,一次纯水系统2)1st pure water,一次纯水3)primary and secondary water system,一二次水系统4)primary water system,一次泵水系统5)primary shield water system,一次屏蔽水系统6)Primary cooling water,一次冷却水系统
英汉例句
Application of connectors and water mixers to primary and secondary water systems;
