The magnesium melt does not react with iron as does the aluminum melt, so the iron crucible can be used to melt the magnesium alloy and contain the melt. The crucible used must be made of welded steel or cast steel and is mainly made of castable or bendable low carbon steel or nickel-free .......

The characteristics of the glass door are determined by the characteristics of the glass itself. For example, when tempered transparent glass is used, the door leaf has a transparent function, and when fr.......

    Scientific use of colored agricultural film can achieve good .......

[China Aluminum Network] spatial grid structure is composed of roughly the same grid or a combination of basic structural units with smaller dimensions. It can transmit three-dimensional spatial structure of force flow. The aluminum alloy spatial grid structure involved in this paper contai.......

Venetian blinds are divided into two types, fixed and movable. It is made up of many thin sheets connected together. It is not only used for ventilation, shading, and sound insulation, but also can cool and shade the room and decorate the living room. Venetian blinds are made of bamboo, wo.......

Many farmers use pesticides to control pests and diseases, often do not pay attention to the interval between the use of vegetables before the market, resulting in large amounts of pesticide residues on vegetables, seriously affecting people's health. .......

Healthy bedroom keyword 1: environmental protection

Bedding should try to choose pure cotton, pure wool or pure hemp fabric, try not to use synthetic materials.

Floors should be made of no.......