H390

H390 is a designation that can refer to several different things, most notably a specific type of industrial sewing machine and a particular strain of a virus.

In the realm of industrial sewing equipment, H390 typically refers to a heavy-duty lockstitch sewing machine. These machines are designed for robust construction and powerful motors, enabling them to efficiently sew through thick and challenging materials such as leather, canvas, denim, and vinyl. They are commonly employed in manufacturing settings for producing items like upholstery, bags, shoes, and workwear. Key features often include a strong needle penetration force, adjustable stitch length and width, and a large working area.

Alternatively, H390 can also refer to a specific strain of the influenza virus. Influenza strains are often designated with a letter indicating the type (e.g., A, B, C), a geographic location of isolation, a strain number, and the year of isolation. For instance, A/H3N2 represents a subtype of influenza A virus. While the exact designation H390 might not be a widely recognized standalone influenza strain name in common public discourse, it could represent a specific laboratory identification or a component within a larger viral classification. Influenza strains are constantly monitored and can cause seasonal epidemics and occasional pandemics.