ISO 8370的本部分规定了确定Vribbed皮带节距区位置的动态方法，该方法表示为有效线差be（见图1）。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This part of ISO 8370 specifies a dynamic method of determining the location of the pitch zone of a Vribbed-belt, which is expressed as an effective line differential be (see figure 1).All current amendments available at time of purchase are included with the purchase of this document.