Most people installs the shutter door in their entrance of building or industry. It is cheap only to block the entrance as a purpose. However, it is easily broken by outside impact and is short life-span. So, customers consider to install the high speed door(ประตูความเร็วสูง) rather than shutter door. However, they do not know the specification of rapid door(ประตูผ้าใบเปิดปิดอัตโนมัติความเร็วสูง). We inform it for you. See the below. MATERIAL - ALUMINUM & 2T SHEET Shutter door is made by steel or stainless. Those material is too weak from outside impact. Only 6 months later, customers could see the corroded frame of it. So, they should repair it or replace it as new one. However, for this, customers should pay the cost. This is a huge burden. To solve this problem, they select the automatic door. COAD Thailand produces the industrial door( ประตูม่านพลาสติกความเร็วสูง) by aluminum as a basic specification. This is applied for all customers. Aluminum is strength from wate
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