cBN新型砂轮
new type cBN grinding wheel
贝利特型砂质油井水泥
oil well sandy belite cement
层间氧化带型砂岩铀矿
interstratified oxidized zone type sandstone urani
低压砂型铸造
L ow- pressure Sand Casting
碟型砂轮磨齿机
gear grinding machine with dish grinding wheel
呋喃树脂砂型
furan resin bonded sand mold
富砂型蠕虫状反射
sand-enriched vermicular reflection