螺栓和螺母 螺栓螺母和外丝内丝一样吗 GS 05040 紧固螺钉 今尾 IMAO GS 05040 深圳电商商业股份有限公司

p1Src=//y2.yzimgs.com/uploads/436066/20171213-151624688.jpg?watermark/2/text/5rex5Zyz55S15ZWG5ZWG5Lia6IKh5Lu95pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/300/fill/I0E3QTlBOA==/gravity/SouthEast