الفترة:
الموضوعات: التآكل؛ التربة؛ الصيانة؛ الخرسانة؛ المباني
Subjects: Egypt; Cleaning; Cotton
Subjects: Maintenance; Restoration
Subjects: Analytical chemistry; Electrochemistry; Friction; Electrochemical analysis
Subjects: Computing; Control systems
Subjects: Electric power systems; Quality assurance
Subjects: Data; Encryption