ISO 5673的本部分规定了拖拉机或自行式机器的动力输出（PTO）驱动轴 用于农业及其机具的功率输入连接（PIC），建立了 确定PTO静态和动态扭转强度，同时给出制造和安全要求。信息技术 仅适用于通过至少两个机械连接至轴的PTO驱动轴和护罩 方位。它不适用于由位置保护的PTO驱动轴，也不适用于动力输出轴的机械特性 超速装置和扭矩限制器，也不考虑环境因素；它也不适用于PTO 传动轴及其防护装置在其出版日期之前制造。

This part of ISO 5673 specifies the power take-off (PTO) drive shafts of a tractor or self-propelled machine used in agriculture and the power-input connection (PIC) of its implement, establishing a method for determining PTO static and dynamic torsional strength while giving manufacturing and safety requirements. It is applicable only to those PTO drive shafts and guards mechanically linked to the shaft by at least two bearings. It is not applicable to PTO drive shafts guarded by location or to the mechanical characteristics of overrun devices and torque limiters, nor are environmental aspects considered; neither is it applicable to PTO drive shafts and their guards manufactured before the date of its publication.