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Anemometer Shanghai Zhengyu Semc Yf6 Yf6-4 Yf6-8 Yf6-8b

Anemometer Shanghai Zhengyu Semc Yf6 Yf6-4 Yf6-8 Yf6-8b
The method of using the anemometer is as follows: 1. Before use, observe whether the pointer of the meter points to the...