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咨询: GBT 13288-1991 涂装前钢材表面粗糙度等级的评定 (比较样块法) The assessment of profile grades of steel surface before application of paint and related products—Comparator 电话:400 810 0369(当地市话费) ; MSN & E-mail:zxd711020@hotmail.com gbstandard@hotmail.com chinastandard@hotmail.com ; QQ: | |||||||||||
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咨询: GBT 13288-1991 涂装前钢材表面粗糙度等级的评定 (比较样块法) The assessment of profile grades of steel surface before application of paint and related products—Comparator 电话:400 810 0369(当地市话费) ; MSN & E-mail:zxd711020@hotmail.com gbstandard@hotmail.com chinastandard@hotmail.com ; QQ: |
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