不凝结气体 meaning in English

incondensable gas

Research on condensation heat transfer with presence of non - condensable gases
具有不凝结气体存在的凝结换热研究
Open the air - release valve of the trap beforework to discharge a large quantity of non - frozen gas . then drivetightly the air - release valve and preheat gradually . the preheatrate should not be more than 36 / minutes
疏水阀在工作前需打开放气阀，使不凝结气体大量排出，然后拧紧放气阀，并逐渐预热，预热率不超过36 / 8分钟。