怎样区别优质的高温风管？
How to distinguish high-quality high-temperature ducts?
1.表面：检查外部和内部表面。优质的高温风管表面应该是非常光滑，无污迹，无皱折，无粗糙和不均衡点。
1. Surface: Check external and internal surfaces. High-quality high-temperature duct surface should be very smooth, no stain, no wrinkle, no rough and uneven point.
2.螺距：弹性钢丝及玻纤线螺距吻合，缠绕均匀。
2. Screw pitch: Elastic steel wire and glass fibre thread have the same pitch, winding evenly.
3.弯曲：产品弯曲自如，有弹性
3. Bending: The product is flexible and flexible.
4.材料：好的高温风管采用优质硅橡胶制作，耐温耐腐蚀性更强。缠绕在弹性钢丝两边的玻纤线采用的是和基布一样的材料，同样具有耐温阻燃的效果，劣质的高温风管通常为节约成本采用的普通尼龙线，不耐温，不阻燃。
4. Material: Good high-temperature air duct is made of high-quality silicone rubber, which is more resistant to temperature and corrosion. Glass fibers wound on both sides of the elastic steel wire are made of the same material as the basic cloth, which has the same effect of temperature resistance and flame retardant. Low-quality high-temperature air ducts are usually made of ordinary nylon wires, which are not temperature-resistant and flame-retardant.