How did the needles taken in ancient sewing clothes be made? Iron and bones should be ground out. ''' There is a way to grind iron bars into needles. ''' the texture should be pig iron and the like ''' ''the bones are unlikely'' ''' embroidery needle ''bone is too bloody'' should not be used for embroidery ''bone,Upstairs,How could it not be??The earliest was the stone, the earliest was the bone, and the Beast bones that came back from hunting were used to make ancient times,Our ancestors learned to sew simple clothes such as animal skin and leaves with fishbone needles and stone needles,With the development of iron and metal manufacturing technology,People gradually learned to use metal needles to sew clothes,The shape has also been greatly improved,And has been used so far.The earliest sewing machine was to sew cloth or leather with single, double and multiple wires and machine needles,Or sew a machine with decorative thread marks on the seam material.For home, industrial and service companies.After the mid

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The computer flat car cuts the bottom line without cutting the Surface line Computer flat car,Sometimes the reason for cutting the bottom line: 1. The car can't cut the line. maybe it's a reason,Most likely, the screws are loose;Solution: first put the needle version of the screw Ning loose,Then tighten the small screw a little,The small screw is on the side of the needle screw,Remember to try it a little bit.2, it may be that the cutting time is not adjusted;Solution: If you can't cut the bottom line, you should adjust the time quickly,Then slowly observe.3. the blade has been worn out for a long time;Solution: change the knife to catch the light clip, the locust, the Jiwei, or remove the grinding.Introduction to Computer flat car: electromechanical integration--The so-called Mechatronics is a combination of applied mechanical technology and electronic technology.The so-called mechanical and electrical products in the sewing machine industry are mainly computer sewing machines.Semi-Automatic sewing machine c