电 话：xxxx-00000000
传 真：xxxx-000000
邮 箱：xxxxx.cn
地 址：xxxxxxxxxx
Material: galvanized steel plate
Size: Fit with the size of air duct or tuyere
Blade is herringbone opening method, adopts the link drive, can adjust the full open, half open or full closed.
Fortune 500 Government platform Bulk package TOP developer Public facilities Universities and hospitals
