The product is made of four layers of non-woven fabric, mask belts and nose clips by mechanical pressing. The product helps protect you from dust and smog particles air-borne particles, droplets and other harmful particles.
Blue disposable face mask is composed of 3 ply non woven fabric. Outer layer is non woven blue spunbond which is anti-fluid splash, middle layer is Melt Blown farbic which can be cut off germs, the inner layer is non woven white spunbond which is soft and
When the fluid flows in the pipeline, due to the local resistance of the orifice plate, the pressure of the fluid is reduced and the energy loss is caused. This phenomenon is called throttling in thermodynamics.
Power transmission and distribution systems send electricity from distant power plants to customers through regulation, electricity is transmitted through high-voltage transmission lines and then reduced at several substations before it is suitable for us