الصفحة الرئيسية > Term: hard needles (or inclusions)
hard needles (or inclusions)
A term applied in the grading of quartz crystals to fairly large needlelike inclusions or imperfections that appear to be hard.
- قسم من أقسام الكلام: noun
- المجال / النطاق: التعدين
- الفئة: تعدين عام; Mineral mining
- Government Agency: USBM
0
المنشئ
- ed.young
- 100% positive feedback
(Milwaukee, United States)