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. 2021 Jul 27;65(8):966–978. doi: 10.1093/annweh/wxab011

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© The Author(s) 2021. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 4. — TEM-EDX images showing (a) spherical Cr/Ni/Al UF particles collected in booth #1; (b) irregular Cr/Ni UF particles from booth #3; (c) irregular Cr/Ni UF particles from booth #1; (d) spherical Al fine particle from booth #1.