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(A) Schematic diagrams of cryogenic testing system for three-point bending and tensile tests. Reprinted from ref. [106], Copyright 1969 Elsevier Ltd. (B) SEM image of GO coated SCFs. Reprinted with permission from ref. [105], Copyright 2016 Elsevier Ltd. (C) SEM images of graphene oxide grafted on CF. Reprinted with permission from ref. [107], Copyright 2020 Elsevier Ltd.
