China Heating element of l GB Standards Search Result |
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GB/T 17225-2017 Hygienic requirements of microclimate for heating classroom in middle and elementary school 中小学校采暖教室微小气候卫生要求 - 中英文版 |
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GB/T 18113-2010 Heating element of lanthanum chromite at high temperature 铬酸镧高温电热元件 - 中英文版 |
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GB/T 17225-1998 Standard of heating temperature for classroomof elementary and secondary school 中小学校教室采暖温度标准 - 中英文版 |
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