国产在线观看免费,xxx国产,色青小说,色偷偷导航,中文字幕一区二区三区5566,97国产在线视频公开免费

ARTICLES
 
ARTICLES
High alumina refractory brick for electric furnace roofs

High alumina refractory brick for electric furnace roofs?is made from selected bauxite chamotte by advanced technical process under strict quality control. The main mineral components are corundum and mullite phases. It features excellent high temperature mechanics and chemical corrosion resistance

 
 

Copyright Yangquan Huaxu?International?Trade Co., Ltd?.All Rights Reserved

備案序號:晉ICP備12007905號

Tel:0353-2020956?? Fax:0353-2020965 ?? E-mail: jiqingwei@yqhuaxu.com