quartzn.石英
quartz sleeve石英套筒
quartz grains石英碎砾
quartz gravel石英砾
quartz filter石英滤波器,晶体滤波器
quartz mining石英石金矿脉
quartz diorite石英闪长岩
quartz lattice流纹英安岩
quartz veinlet石英脉
quartz-fibren.石英丝;石英纤维
quartz-timer数字式石英校表仪,晶体定时器,石英表校表仪