The staircase is constructed of laminated 3/4" plywood sheets, and all of the components are interlocking using mortise and tenon joints instead of fasteners.  Search “instead+of是什么意思英语翻译【精+仿++微wxmpscp】” from An Intern Architect Builds a Home For His Growing Family on a Strict Budget

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The staircase is constructed of laminated 3/4" plywood sheets, and all of the components are interlocking using mortise and tenon joints instead of fasteners.