Linux kernel newbies em português

Sintered kiln of refractory is usually divided into two types: Intermittent down-draft kiln and continuous tunnel kiln, the firing temperature is from 1200 to 1900`C, and even higher. If divided by firing temperature: temperature below 1350℃ is called low temperature sintering kiln; temperature between 1350℃ and 1550℃ is called medium temperature sintering kiln; temperature between 1550℃ and 1750℃ is called high temperature sintering kiln; temperature up 1750℃ is called ultra temperature sintering kiln.