- main distributing frame
- main distribution frame
- mdf
- 主: host
- 配线板: distributing board; patchboa ...
- 配线板: control panel; patch board; patchboard; plugboard
- 主配线架: main distributing frame; main distribution frame mdf; mainframe; mdf main distribution frame; mdf: main distribution frame
- 主配线架(用户线): main distribution frame mdf
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