Right now, Hockaday's prototypes put out only a few milli - watts of power.现在, 霍克蒂的燃料电池原型只能输出几毫瓦的电力.Industrial designers sketch and create rough prototypes from foam board and other materials.工业设计者会拟出草图,用泡沫板和其他材料创建出...
Fat is an excellent insulator against the cold.脂肪是极好的抵御寒冷的绝热体。Any two conductors separated by an insulator are said to form a capacitor.由绝缘体隔开任何两个导体就组成电容器.The FRP is an insulator to electricity, so it is good in safety.因...