漏出

1. Origins, structure, and basic meaning

• Structure: 漏出 (ろうしゅつ) is an action noun for gas or liquid escaping from a pipe or container.
• Basic usage: ガスが漏出した makes the escaping gas the subject, while 液体の漏出を防ぐ makes leakage the event to be prevented by closing a valve.

2. Common pitfalls and similar expressions

• Escaping substance and leakage event
  • ガスが漏出する is an event with the substance as subject, while 液体の漏出 is a noun phrase naming leakage of a liquid. It does not say that the pipe or valve itself escaped.