Okay, the user wants me to translate "purely mechanical" into Thai. Let me check the rules again. The first rule says to translate all content into Thai. The second rule states that if the content is already in Thai, leave it as is. The third rule is to provide only the translation without any explanations.
So, "purely mechanical" is in English, so I need to translate it. The Thai translation for "purely mechanical" would be "เพาเวอร์มีเชนิคอล" or "เพาเวอร์มีเชนิคอล" depending on the context. Wait, maybe "เพาเวอร์มีเชนิคอล" is more accurate. Let me confirm. "Purely" can be "เพาเวอร์" and "mechanical" is "มีเชนิคอล". So combining them, it should be "เพาเวอร์มีเชนิคอล". I think that's correct. I'll make sure there's no existing Thai text here, so no need to leave it unchanged. Just output the translation.