Railing
来自Big Physics
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Middle English: from Old French reille ‘iron rod’, from Latin regula ‘straight stick, rule’.
etymonline
railing (n.)
late 14c., "the attaching (of a plant, vine, etc.) to a prop or stake;" early 15c., "construction in which rails form an important part," verbal noun from rail (v.2). Technically, railings (late 15c.) are horizontal, palings are vertical.
