色综合中文字幕不卡_在线看国产不卡无码视频_久久久综合九色合综_欧美精品久久久久久久自慰 欧美综合婷婷欧美综合五月,狠狠的干中文字幕,网站资源多午夜激情影院,人人妻人人澡人人看

Silicon Metal

Silicon Metal

Metal silicon, also known as industrial silicon, is a product smelted from silica and carbonaceous reducing agents in submerged arc furnaces. The main component silicon content is usually above 98.5% and below 99.99%. The remaining impurities are iron, aluminum, calcium, etc. . In China, metal silicon is usually divided into different grades such as 553, 441, 421, 3303, 2202, and 1101 based on the content of iron, aluminum, and calcium in metal silicon.

+ Read More

Welcome to your inquiry!

Service Hotline:+86 15837207537    Whatsapp:8615837207537    Email:info@lsalloy.com