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    1. technical data sheet: suprasec-5005
    2. iso 8301: thermal insulation ¡ª determination of steady-state thermal resistance and related properties ¡ª heat flow meter apparatus
    3. gb/t 20219-2006£ºÓ²ÖÊÅÝÄ­ËÜÁϵ¼ÈÈϵÊý²â¶¨±ê×¼£¨Öйú¹ú¼Ò±ê×¼£©
    4. astm c518: standard test method for steady-state thermal transmission properties by means of the heat flow meter apparatus
    5. european polyurethane insulation association (epia), ¡°thermal performance of polyurethane insulation in refrigeration equipment¡±, 2021
    6. Öйú¼ÒÓõçÆ÷Ñо¿Ôº£¬¡¶±ùÏä½ÚÄܼ¼Êõ°×ƤÊé¡·£¬2022
    7. kim, j., et al. (2020). "effect of foam density on thermal insulation performance of polyurethane foams for refrigerators", journal of applied polymer science
    8. liu, y., & wang, h. (2019). "green polyurethane foams for sustainable refrigeration applications", green chemistry letters and reviews

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