不锈钢风道具有减少泄露、安装空间小、工艺精细、使用寿命长等特点和优势。Stainless steel air duct has the characteristics and advantages of reducing leakage, small installation space, fine process and lo ...……
热轧钢在汽车上主要用于制造横梁和车架等比较厚的零部件。它是在730℃以上的高温下轧制的，厚度在4mm以上。Hot-rolled steel is mainly used in cars to make thick parts such as beams and frames.It was rolled a ...……
