Primary Life Support System

（重定向自Portable Life Support System）

A Portable Life Support System from the Apollo A7L suit, with its outer cover removed

Diagram of the A7L PLSS and OPS, with interfaces to the astronaut and the Lunar Module cabin

A Primary (or Portable or Personal) Life Support System (or /Subsystem) (PLSS), is a device connected to an astronaut or cosmonaut's spacesuit, which allows extra-vehicular activity with maximum freedom, independent of a spacecraft's life support system. The PLSS is generally worn like a backpack. The functions performed by the PLSS include:

单词	Portable Life Support System
释义	Portable Life Support System 英语百科 Primary Life Support System （重定向自Portable Life Support System） A Primary (or Portable or Personal) Life Support System (or /Subsystem) (PLSS), is a device connected to an astronaut or cosmonaut's spacesuit, which allows extra-vehicular activity with maximum freedom, independent of a spacecraft's life support system. The PLSS is generally worn like a backpack. The functions performed by the PLSS include:
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