CPC F24F 11/48 (2018.01) [G01R 31/2875 (2013.01)] | 17 Claims |
1. A testing apparatus, comprising:
a base; and
a preheating unit arranged on the base, wherein the preheating unit comprises:
a gas generator discharging air toward the base to form an air wall;
a blocking mechanism located above the air wall and forming a heat preservation space with the air wall; and
a heating device arranged in the heat preservation space.
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