雙金屬片 "旗手"
利用雙金屬申鐵片技術, 當燈泡亮起時其熱力可使雙金屬片向直伸展, 旗子便升起
220V A.C. 木底座連220V 燈泡
Item no : JHL 622

Bimetallic Flag 　
It is an interesting instrument to teach pupil the properties of bimetallic strip and its applications. It contains a 220V a.c lamp bulb on holder, one moon sharp high quality bimetallic strip and a plastic flag. When the lamp is on, it will heat the bimetallic strip and make it turns straight , then the flag will rise in a big angle. Student will be very surprised and enjoying .
Item no : JHL 622