books كتاب the osha
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كتاب THE OSHA (Book)
كتاب THE OSHE هو رحلة سريعة لدراسة قوانين ومتطلبات الأوشا الصناعات العامة والانشاءات، كتاب دراسي سهل وبسيط وفي متنأول الأيدي.
