الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين DUCT WORKS Selection Tips DETAILED TECHNICAL SPECIFICATION A. All ducting must be made of galvanized steel sheet to ASTM A525 lock-forming quality, having zinc coating of 275gm/M² for both sides in accordance with ASTM A90 and of tensile strength […]
DUCT WORKS
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