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METHOD OF INSTALLING BLACKBOARD IN CLASSROOM CORNER
METHOD OF INSTALLING BLACKBOARD IN CLASSROOM CORNER
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机译:在教室角落安装黑板的方法
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摘要
FIELD: stationary. SUBSTANCE: blackboard is turned according to given scheme of design by angle whose value is determined on the basis of equation. The blackboard edge is fastened according to the same scheme of design at a distance from front bearing plane whose value is determined on the basis of another equation. EFFECT: simpler design. 3 dwg
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