title: STUDY OF OPERATING PERFORMANCE OF A CRITICAL ORIFICE OF THE HEXHLET GRAVIMETRIC DUST SAMPLER.
mesh_terms: D000397:Air Pollution; D004391:Dust; D004864:Equipment and Supplies; D012106:Research
chemical_list: D004391:Dust
keywords: AIR POLLUTION; DUST; EQUIPMENT AND SUPPLIES; EXPERIMENTAL LAB STUDY