Compare: 枢 vs 枢
枢とぼそ
cavities in the frame of a door used as part of a pivot hinge
枢くるる
pivot hinge (using extensions on the top and bottom of a door that fit into cavities in the frame)
くるる枢
N3Noun
pivot hinge (using extensions on the top and bottom of a door that fit into cavities in the frame)
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