您可将安装标准输入到O形圈计算软件，例如：孔和轴的直径。软件可以很快计算出O形圈和孔的英制和米制尺寸。软件还有O形圈快速查找功能——能让您找到符合各种国际标准的O形圈的尺寸

How to operate:

1、You can use your mobile phone in WeChat or Alipay software sweep function to scan the two-dimensional code image

2、Long by this two-dimensional code identification and download