象山捷众机械制造有限公司生产的尼龙包胶双线圈，又称YO圈，适用于笔记本，书本，广告册，台挂历等的装订成册。使用该铁双线圈装订的本册，具有如下特点：
The xiangshan the machinery manufacturing co., LTD. The production of nylon bag glue double coil, also called YO circle, suitable for notebook, books, advertising copies, table calendar, bind up it. Use the iron double-wire binding of this, has the following features:
1. 本册可以360度打开
1. This can open 360 degrees
2. 可以不损坏纸张移走或装回任何一张内页。
2.Can not damage the paper moved or pack to return any a pages.
本公司的生产的铁圈质量好，获海内外
The company’s production of iron ring are of good quality and won both at home and abroad
双线圈规格：
Double coil specification:
齿距 | 规格（圈径） | 齿/卷 A | 齿/卷 B | 线径 | *装订厚度 | 文仪盒包装 |
P3:1 | 3/16“（4.8mm) | 118000 | 135000 | 0.65mm | 3.0mm | 100 |
1/4"(6.4mm) | 80000 | 95000 | 0.70mm | 4.0mm | 100 | |
5/16"(7.9mm) | 58000 | 66000 | 0.80mm | 5.6mm | 100 | |
3/8"(9.5mm) | 42000 | 48000 | 0.80mm | 7.0mm | 100 | |
7/16"(11.1mm) | 28000 | 37000 | 0.90mm | 9.5mm | 100 | |
1/2"(12.7mm) | 24000 | 27000 | 0.90mm | 11.0mm | 100 | |
9/16"(14.3mm) | 18000 | 23000 | 1.00mm | 12.7mm | 100 | |
5/8"(15.9mm) | 15000 | 16500 | 1.05mm | 13.2mm | 50 | |
P3:1 | 1/4"(6.4mm) | 53000 | 63000 | 0.70mm | 4.0mm | 100 |
5/16"(7.9mm) | 40000 | 44000 | 0.80mm | 5.6mm | 100 | |
3/8"(9.5mm) | 28000 | 32000 | 0.80mm | 7.0mm | 100 | |
7/16"(11.1mm) | 19000 | 24000 | 0.90mm | 9.5mm | 100 | |
1/2"(12.7mm) | 16000 | 18000 | 0.90mm | 11.0mmmm | 100 | |
9/16"(14.3mm) | 12000 | 15000 | 1.00mm | 12.7mm | 100 | |
5/8"(15.9mm) | 10000 | 11000 | 1.10mm | 13.2mm | 50 | |
3/4"(19.0mm) | 7000 | 8600 | 1.15mm | 15.0mm | 50 | |
7/8"(22.2mm) | 4500 | 6700 | 1.25mm | 21.0mm | 50 | |
1"(25.4mm) | 3600 | 4700 | 1.25mm | 21.0mm | 50 | |
1-1/8"(28.6mm) | 2800 | 3300 | 1.30mm | 24.0mm | 50 | |
1-1/4"(31.8mm) | 2000 | 2850 | 1.40mm | 27.0mm | 50 |
