金属线膨胀演示器 XCGSX-J2258 图片

p1Src=//y3.yzimgs.com/uploads/527761/20171123-15219230.jpg?watermark/2/text/5rKz5YyX5pif6IGU5pmo56eR5oqA5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/400/fill/I0E3QTlBOA==/gravity/SouthEast"