Thepa e se nang letho: Copper, Aluminium, Carbon Steel, Stainless Steel Bare tube OD: 25-38mm Fin general material: Copper, Alloy, Aluminium, Carbon Steel, Stainless Steel Fin pitch: 2.1-3.5mm Bophahamo ba Fin: <20mm Botenya ba Fin : 0.2-0.5mm
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