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ECCJ / Text Thailand

Q16. From among the following descriptions (1) to (4) of thermal insulation, choose correct ones.
Q17. From among the following descriptions (1) to (2) of the calculation of the effect of enhanced thermal insulation, choose correct ones.
Q18. From among the following descriptions (1) to (2) of the calculation of the effect of material preheating, choose correct ones.
Q19. From among the following descriptions (1) to (5) of heat retention, choose correct ones.
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