As the representative of the oldest air tools, the earliest air guns can be traced back to 1580, when air guns used air pumps rather than air compressors to compress air. Although the design of the early air guns was far inferior to today's air guns, the... moreAs the representative of the oldest air tools, the earliest air guns can be traced back to 1580, when air guns used air pumps rather than air compressors to compress air. Although the design of the early air guns was far inferior to today's air guns, the shooting speed of the air gun projectiles could have reached 200-300 meters per second at that time, which was extremely amazing.
The biggest difference between air guns and common firearms is that the kinetic energy source of the projectile is different. Firearms rely on the high-energy expansion gas generated by the intense combustion of propellant and other propellants to push the projectile. The energy comes from the chemical exothermic reaction. The air gun uses the gas pressurized by the air pump to eject the projectile, so the gas pressure generated by the air gun is much lower than that of the firearm, and the power of the air gun is usually weaker than that of the firearm.
Although the power of air guns is weaker than that of firearms, early... less
यहां सब एक माला के मोती होंगे,
जो मिलकर सबके सुख दुःख बाटेंगे।
न कोई गलत पोस्ट करेगा,
न कोई गलत बर्दाश्त करेगा।
जितना ज्यादा से ज्यादा हो जुड़े
और ओरो को जोड़े ।
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The main functions of Waterproof Fabric https://www.wanshiyitex.com/ are: waterproof, moisture permeable, breathable, insulating, windproof and warm-keeping. In terms of manufacturing technology, the technical requirements of waterproof and breathable... moreThe main functions of Waterproof Fabric https://www.wanshiyitex.com/ are: waterproof, moisture permeable, breathable, insulating, windproof and warm-keeping. In terms of manufacturing technology, the technical requirements of waterproof and breathable fabrics are much higher than those of ordinary waterproof fabrics. At the same time, in terms of quality, waterproof and breathable fabrics also have functional characteristics that other waterproof fabrics do not have. Waterproof fabric not only strengthens the air tightness and water tightness of the fabric, but also has its unique vapor permeability, which can enable the water vapor in the structure to be rapidly discharged, avoid mold growth in the structure, and keep the human body dry all the time. It perfectly solves the problems of air permeability, wind resistance, waterproof, heat preservation and the like. It is a new type of healthy and environment-friendly fabric.
Under the condition of water vapor, water particles are very fine, and... less
