semiclosed system
Technical term used in engineering, ecology, or systems theory to describe a system that is partially closed to external exchange.
This factory uses a semiclosed cooling system.
閉鎖式 means a fully closed system, while 半閉鎖式 is partially closed.
開放式 means an open system, the opposite of 半閉鎖式.
semiclosed rebreather
Compound of 半 (half), 閉鎖 (closure), and 式 (type/system).