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Steel structure design, H-beam max. deflection calculation, H ºñÀÓ °µµ°è»ê,ö ±¸Á¶¹° °µµ°è»ê, óÁü·® °è»ê °ø½Ä, °ü¼º¸ð¿ì¸àÆ®°è»ê
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