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来源：雅诚德英语网
A pneumatically activated butterfly valve is located close to the condenser to isolate the vacuum system from the condenser.
在靠冷凝器的位置有一个气动蝶阀，将冷凝器与真空系统隔开。
A pneumatically activated butterfly valve is located close to the condenser to isolate the vacuum system from the condenser.
在靠冷凝器的位置有一个气动蝶阀，将冷凝器与真空系统隔开。