Chapter 7.3 Particulate matter - World Health Organization
2020-2-1 · Type Ⅰ (single powder: 15–25μm, 8–16μm, 4–8μm, 2–4μm, and 1–2μm; brown and black cBN powders correspond to sample A and sample B series) and Type Ⅱ (mixed powder: 15–25μm: 8–16μm: 2–4μm = 7:2:1 and 1:6:3; sample M series) were taken. Each type of brown and black cBN powder was subjected to the process diagram of simulated low-pressure and ...
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