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Code/Name：

Code	Description	Units
GBW12001	Turbidity Standard Solution
GBW12002	Calibrated Glass Beads
GBW12003	Calibrated Glass Beads
GBW12004	CRM for Determining of Flowability of Metallic Powders
GBW12017	Particle Size Certified Reference Materials
GBW12018	Particle Size Certified Reference Materials
GBW12019	Particle Size Certified Reference Materials
GBW12031	Particle Size Certified Reference Materials
GBW12041	Medium Test Dust (MTD) with Narrow Distribution Particle Size Certified Reference Material
GBW12042	Medium Test Dust (MTD) with Narrow Distribution Particle Size Certified Reference Material