Etiquette refers to manners polite speech. A person should behave in society by orderly pattern, an appropriate occasions, such as standing, walking, sitting, dining, sending and receiving. Salute, display manners.A conversation using words, including his practice activities, such as talking between ผู้ฝึกอบรม lectures in class, using a mobile phone. Or play online during training or perform sit sleep in class.
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