principal door
definitions
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The main entrance or primary point of access to a building, house, or structure.ja: 主要な入り口
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The most significant or primary door among a series of doors in an architectural design.ja: 設計上の主要な扉
examples
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The guests were welcomed at the principal door of the estate.
客たちは屋敷の正門で迎えられた。
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In the architectural blueprint, the principal door is highlighted to distinguish it from service entrances.
建築図面では、主要な扉がサービス入口と区別するために強調されている。