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စမတ်ရေချိုးခန်းမှန်: ကြေးမုံ၏ဖွံ့ဖြိုးတိုးတက်မှုနှင့်သမိုင်း

2021-06-03

လူတို့သည်ရှေးခေတ်မှထင်ဟပ်ပေါ်လွင်လာအောင်ပြုလုပ်နိုင်ခဲ့ကြသည်။ အစအ ဦး ၌, ရေအဖြစ်အသုံးပြုခဲ့သည်မှန်. From the Yin and Shang Dynasty to the Tang, Song, Yuan, Ming and Qing Dynasties, the မှန် for self-reflecting evolved into a bronze မှန်. The earlier glass မှန်s in China appeared in the Ming and Qing Dynasties. It was brought from Europe by missionaries who came to China. This European-style glass မှန် has to go through tens of thousands of miles of sea roads and bumps all the way. Taking into account the fragility, the မှန် surface is generally narrow and easy to carry; the မှန် is mostly used for shaving and shaving, and the မှန် surface is only enough to shadow the partial beard.Then, with the passage of time, the silver မှန် used by most of us came into being. With the development of technology, the function of the မှန် is only self-reflection, it is more intelligent and more humane. More functional, such as: anti-fog, watch time, measure temperature, watch TV, etc. The material of the မှန် has also been upgraded from a silver မှန် to an "environmental protection မှန်". This မှန် uses lead-free paint, which is a technical breakthrough of silver မှန်s. This kind of မှန် is called a lead-free and copper-free မှန်, also known as an "environmental protection မှန်.

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