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mohammed-بركات-16601932
Question added by mohammed بركات, رئيس قسم الحركة ، ومراقبة الوقت, العربية للمر افق - 8 years ago

كيف تحفر على عمق اكثر من متر وتؤمن القائمين على الحفر؟

Drilling Engineering

Earthworks

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