The limitation of secondary accretion of placer gold and nugget;
砂金及“狗头金”次生增生的有限性
Study on new technic of purifying gold,silver from placer gold without pollution;
无污染从砂金中提纯金、银新工艺方法的研究
Fineness features of placer gold in the middle part of the Bangonghu lake to Nujiang River mineralization belt,Tibet;
西藏班公湖—怒江成矿带中段砂金成色特征
Abstraction and refining of gold and silver in the Nima gold placer deposit, Tibet;
西藏尼玛砂金矿中金和银的提纯与精炼
Geology of the Xiaopenhu-Laxongco gold placer belt in Qiangtang, northern Xizang;
藏北羌塘小盆湖-拉雄错砂金矿带地质特征
Study on hydrochemical mineralization factor of gold placer;
砂金水化学成矿因素探讨
Prediction of alluvial gold mineralization on northwest beach of Shandong province;
胶东半岛西北部滨海砂金成矿预测
THE MINERALIZATION LAWS OF THE ALLUVIAL GOLD PLACERS AT ALTAI MOUNTAIN
阿尔泰山冲积型砂金矿的砂金富集规律
aventurine spangled densely with fine gold-colored particles.
布满闪烁的金色小颗粒的砂金石。
A deposit of gold ore in an old riverbed.
富金砂矿古河床里的金砂矿床
Applicable sand material: Aluminum oxide Sand of ＃26-＃320, carborundum, glass beads, Plastic sand blasting grains.
适用砂材：＃26-＃320氧化铝砂、金刚砂、玻璃珠、塑胶喷砂粒等。
cloth covered with powdered emery.
覆有金刚砂粉末的布。
dresser ,grinding wheel, of base metal
砂轮整形器,贱金属制
abstract metal from ore
从矿砂中提取金属.
They panned off the sand and dirt.
他们用淘金盘淘去砂泥。
emery-coated beam
金刚砂卷布辊，金刚导布辊
emerized fabric
金风砂起绒织物，仿麂皮起绒织物
glass dulled by treatment with acid or emery
用酸或金刚砂处理的毛面玻璃
stiff paper coated with powdered emery or sand.
覆有金刚砂粉末或沙的硬纸。
(trade mark) an abrasive composed of silicon carbide crystals.
（商标）由金刚砂晶体构成的研磨剂。
A trademark used for an abrasive of silicon carbide crystals.
金刚砂一种碳化硅晶体磨料的商标名
He wants to determine what metals are present in the ore.
他要测定矿砂中有什么金属存在。
drum ,rotating, for descaling, desanding or packing of goods
金属物品除垢、除砂或抛光转筒
Research on Surface Grinding of SCFS with Diamond Wheel;
金刚石砂轮平面磨削石英陶瓷的研究
Investigation on Processes and Mechanism of Belt Grinding of Metallic Materials;
砂带磨削金属材料的工艺及机理研究