旧来

1. Origins, structure, and basic meaning

• Structure: Written 旧来 and read きゅうらい, it describes a method or system handed down from earlier times and still in use.
• Basic usage: It modifies conventional methods that cannot meet a new problem and old-style equipment being replaced in stages.

2. Common pitfalls and similar expressions

• More than merely old
  • The word stresses continuity from established past practice, not just existence at some past time.