真空式蒸汽供暖系统

вакуумная система парового отопления

湿式回水蒸汽供暖系统

steam heating system with wet return

重力排气式蒸气供暖系统

steam heating with gravity air removal

封闭式呼吸气体系统

{工} closed respiratory gas system

下给式双管热水供暖系统

two pipe direct downfeed system

下行上给式蒸汽供暖系统

up-feed steam heating system

双管下给式热水供暖系统

two-pipe hot water downfeed system

上行下给式蒸汽供暖系统

steam-heating down-feed system

重力上行下给式蒸气供暖系统

steamheating down-feed gravity system