outside telephone line; external line
Refers to a telephone line that connects to outside numbers, as opposed to an internal extension (内線).
To get an outside line, please press zero first.
The outside lines are busy and I can't get through.
outer circle; outer line
Used in geometry or technical contexts for an external circle or line, such as in diagrams or sports fields.
Calculate the length of the outer line of this figure.
UV-EPROM; ultraviolet erasable programmable read-only memory
Compound of 外 (outside) and 線 (line).