混泥土蓄热系数测试仪 蓄热系数测试仪 JZ-XRY-II 北京同德创业科技有限公司

p1Src=//y1.yzimgs.com/uploads_old/378650/2014102813202195_old.jpg&p2Src=//y1.yzimgs.com/uploads_old/378650/2014102813202195_old_1.jpg