6although the vacuum piping system passes the gas leakage test it shall also bear a test of vacuum degree prior to the linkage trial run of the vacuum system.
6真空管道在气体泄漏性试验合格后，真空系统联动试运转时，还应进行真空度试验。
6although the vacuum piping system passes the gas leakage test it shall also bear a test of vacuum degree prior to the linkage trial run of the vacuum system.
6真空管道在气体泄漏性试验合格后，真空系统联动试运转时，还应进行真空度试验。
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