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ایمنی انواع جرثقیل
 
تقسیم بندی مواد سمی
 
نوع تلسكوپي
 
نوع بوم خشك
 
جكهای تعادل
 
تسمه های اتصال
 
Hook
 
جرثقیل های سقفی
 
کار با جرثقیل
 
قلاب جرثقیل
 

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