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标题:
ISO 6944-1985
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作者:
jiyunshang
时间:
2020-3-27 11:38:02
标题:
ISO 6944-1985
Fire tests on building materials and structures —
Part 24: Method for determination of the fire resistance of ventilation ducts —
作者:
admin
时间:
2020-3-31 16:27:40
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