low vacuum seal
英 [ləʊ ˈvækjuːm siːl]
美 [loʊ ˈvækjuːm siːl]
网络 低真空密封
双语例句
- The boiloff rate of liquid helium of the model SR& 2 is less than 4. 2 liters/ day. A valve of low melting point alloy is used for vacuum and seal. It is vacuumed easily and sealed reliably.
SR&2的液氮日蒸发率小于4.2升/日，容器夹层抽空密封采用低熔点合金阀，抽空容易、密封可靠，经七年使用，未发现漏气现象。