2. In plain carbon steel, carbon is the only alloy element . 只有在普碳钢中，碳才是唯一的合金元素。
3. Our products includes steel pipe, machinery facilities, metal material, plastics, chemical raw material, clothing, workmanship, and so on. 产品包括钢管，机械设备，金属材料，塑料制品，化工原材料，衣服，手工艺品等等。
英英解释
n.
1. an alloy of iron with small amounts of carbon; widely used in construction; mechanical properties ca
2. a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard
3. knife sharpener consisting of a ridged steel rod v.
1. get ready for something difficult or unpleasant
2. cover, plate, or edge with steel
