Yo ring assembly generally refers to the double loop wire, also known as the YO ring (from the English "Wire-O-Binding"), the O coil assembly. The double loop wire is two strands of steel ring set in advance in size and specification, and the common material is divided into two kinds of plastic steel ring and plastic coil. A circular hole or square hole is usually played on the left or top of the printed matter. The YO double loop is passed through the YO ring binding machine and pressed and fixed, and the whole binding procedure is completed.
When selecting coils, it is necessary to pay attention to the quality of the coils. Some coils will cause cracks in the binding because the plastic layer of the surface is not strong enough. The coils are too thin and there will be problems such as tight binding and so on.
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