The history of mankind's acquisition of a vacuum can be traced back to the 6th century BC. Smelting furnaces and alchemy furnaces are equipped with negative pressure suction and pressurized exhaust, oil-free compressors, high-pressure machines, Leybold vacuum pumps, dry screw vacuum pumps, rotary

Nitrogen is a colorless, odorless, non-toxic, non-combustible, high-pressure gas stored in a cylinder. When its content increases and the oxygen content is below 19.5%, it may cause suffocation. Need to be equipped with self-priming breathing mask. The bottled nitrogen product is a high-pressure f

Carbon dioxide (carbon dioxide), a kind of carbon oxygen compound, has a chemical formula of CO2 and a chemical formula weight of 44.0095. It is a colorless, odorless or colorless odorless gas at room temperature and pressure, and its aqueous solution has a slightly sour gas. It is also a common G

SF6 gas has a history of one hundred years. It is an artificial noble gas synthesized by two French chemists, Moissan and Lebeau in 1900. Around 1940, the US military used it for the Manhattan Project.SF6 is a strong electronegative gas. Its molecules can easily absorb free electrons to form large