PROFIBUS is developed process field bus. It has been widely applied to wide range. It has been actually turned into international and exoteric standard of field bus .
PROFIBUS是成熟的过程现场总线，它已在很大范围内得到了广泛的应用，如今已成为国际化的开放式现场总线标准。
Covering North America, PTO is one of 25 regional associations that make up PI (PROFIBUS and PROFINET International).
PTO覆盖整个北美地区，是组成PI（PROFIBUS和PROFINET国际）的25个区域性协会之一。
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