A.洗爐墻約5%、洗爐缸2~3% B.洗爐墻2~3%、洗爐缸5% C.均為2~3% D.均為5%左右
A.≤6mm B.≤8mm C.≤10mm D.≤12mm
A.氧化氣氛 B.還原氣氛 C.中性氣氛 D.高溫氣氛