Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. It is composed primarily of the mineral calcite (CaCO3) and usually contains other minerals, such as clay minerals, micas, quartz, pyrite, iron oxides, and graphite. Under the conditions of metamorphism, the calcite in the limestone recrystallizes to form a rock that is a mass of interlocking calcite crystals. A related rock, dolomitic marble, is produced when dolostone is subjected to heat and pressure. http://www.hzxstone.com/marble/

Steel pipes are steels with a hollow cross-section whose length is much greater than the diameter or circumference. According to the cross-sectional shape, it is divided into circular, square, rectangular and special-shaped steel pipes; according to the material, it is divided into carbon steel pipes, low-alloy structural steel pipes, alloy steel pipes and composite steel pipes; Steel pipes for thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, high-pressure equipment, etc. http://www.tszxsteel.com/steel-pipe/carbon-steel-pipe/

Steel strip, also known as strip steel, is a long-length steel plate that is mostly supplied in coils. Those with a width below 600mm are called narrow strips, and those exceeding 600mm are called wide strips. It has the advantages of smooth and smooth surface, high dimensional accuracy and good mechanical properties. At the same time, steel plates can be divided into many types.http://www.tszxsteel.com/steel-plate/galvanized-steel-plate/

Steel strip, also known as strip steel, is a long-length steel plate that is mostly supplied in coils. Those with a width below 600mm are called narrow strips, and those exceeding 600mm are called wide strips. It has the advantages of smooth and smooth surface, high dimensional accuracy and good mechanical properties. At the same time, steel plates can be divided into many types. http://www.tszxsteel.com/steel-plate/

Basalt is an extrusive igneous or volcanic rock that has a low silica content, dark in colour, and is very rich in iron and magnesium. Basalt rock is mainly composed of pyroxene, olivine, and plagioclase and is the most common rock on the earth's surface. The texture of basalt rocks is coarsely porous as those holes are left by gas bubbles.http://www.hzxstone.com/sandstone/