墨西哥1974年20分铜币,墨西哥1974年20分铜币,直径2.85厘米,品相如图自定。,,外国钱币,se105991214,外国钱币,美洲钱币,普通币/钞,,铜币,,,单枚,价格:16,7788铜镜收藏
PURPOSE: An alarm device for safely driving a vehicle is provided to obtain electrical signal related to a warning situation by detecting the pressure change of a steering wheel and converting the pressure change to the electrical signal. CONSTITUTION: Light source(10) radiates light. Optical fiber...