圆管导热系数测试仪 HG218-13 北京百万电子科技中心

p1Src=//y3.yzimgs.com/uploads/367833/2018127-91158387.png?watermark/2/text/5YyX5Lqs55m-5LiH55S15a2Q56eR5oqA5Lit5b-D/font/5a6L5L2T/fontsize/300/fill/I0E3QTlBOA==/gravity/SouthEast