There are many types of nails on the market. What kind of nails are called cement nails? What are the definitions of cement nails? Cement nails, commonly known as steel nails, are a kind of nails. They are made of carbon steel. The material is 45 or 60 steel. It is processed by wire drawing, annealing, nail making, and quenching, so the texture is relatively hard. Its function is to nail to some harder objects that other nails can't nail, because the material is very different from ordinary nails, and it belongs to special nails. Cement nails are very hard, thick and short, and have strong chiseling ability.

　　My country's position as a global hardware manufacturing center will be further stabilized. my country's economic facilities are gradually improved. The industrial development is relatively mature and labor costs are low. It has the comparative advantage of becoming a global hardware manufacturing center. The hardware industry has obvious characteristics of export-oriented development. The strengthening of the central position is first manifested in the overall growth in the export of hardware products in recent years: the export growth rate of major hardware products is higher than the growth rate of output, and higher than the growth rate of domestic market sales; the main hardware and electrical products are fully blooming, electric Tools, hand tools, and construction hardware products, which are traditional export categories, have seen a high growth rate. The huge market and the attraction of the central position will further attract the transfer of the manufacturing center of hardware multinational companies to China.

　　I want to hang some decorative paintings at home. I use a hammer to hit the cement nails. If the wall is crooked, a small piece of the wall can easily fall off. I want to know what measures can be taken to avoid knocking the nails without damaging the wall?

　　Before nailing, stick a piece of plastic tape on the place to be nailed, about 10*10 cm, pay attention to completely adhere to the wall, and tear it off after nailing. You can also use a hand electric drill to install a small drill to drill a small hole (downward obliquely) through the whitewashing layer and then nail the nails.

　　The air vent nails on the market can relieve this concern. Facing the increasingly fierce market environment, if domestic companies do not pay attention to this, it will affect their long-term development. Good sales and service are also the top priority. In addition, the hardware industry’s scientific research and development system reform is progressing slowly, and the gap with foreign countries is obvious. Export products have low foreign exchange earnings, low performance levels, low prices, small enterprise scale, low concentration, and raw material price increases, which have severely restricted the industry’s growth. Further development and improvement of quality.