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NBN T 52-717-1988 7500 Petroleum products - Residual fuel oils - Specifications《石油产品 残余燃料油 规范》.pdf 3

NBN T 52-717-1988 7500 Petroleum products - Residual fuel oils - Specifications《石油产品 残余燃料油 规范》.pdfNBN T 52-717-1988 7500 Petroleum products - Residual fuel oils - Specifications《石油产品 残余燃料油 规范》.pdf

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NBN T 52-716-1988 3125 Petroleum products - Domestic heating fuel - Specifications《石油产品 民用加热燃料 规范》.pdf 3

NBN T 52-716-1988 3125 Petroleum products - Domestic heating fuel - Specifications《石油产品 民用加热燃料 规范》.pdfNBN T 52-716-1988 3125 Petroleum products - Domestic heating fuel - Specifications《石油产品 民用加热燃料 规范》.pdf

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NBN T 04-307-1983 3125 Urea for industrial use - Determination of the puffer confficent - Potentiometric method《工业尿素 甲醛出现时测量ph值的变化（电势法）》.pdf 1

NBN T 04-307-1983 3125 Urea for industrial use - Determination of the puffer confficent - Potentiometric method《工业尿素 甲醛出现时测量ph值的变化（电势法）》.pdfNBN T 04-307-1983 3125 Urea for industrial use - Determination of the puffer confficent - Potentiometric method《工业尿素 甲醛出现时测量ph值的变化（电势法）》.pdf

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NBN T 04-306-1983 1875 Urea for industrial use - Measurement of colour in Hazen tmits(platinum-cobalt scale) of a urea-fonnaldehyde solution《工业尿素 对乙醛尿素溶液中哈森单位（铂钴标度）的颜色测量》.pdf 1

NBN T 04-306-1983 1875 Urea for industrial use - Measurement of colour in Hazen tmits(platinum-cobalt scale) of a urea-fonnaldehyde solution《工业尿素 对乙醛尿素溶液中哈森单位（铂钴标度）的颜色测量》.pdfNBN T 04-306-1983 1875 Urea for industrial use - Measurement of colour in Hazen tmits(platinum-cobalt scale) of a urea-fonnaldehyde solution《工业尿素 对乙醛尿素溶液中哈森单位（铂钴标度）的颜色测量》.pdf

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NBN T 04-305-1983 6250 Urea for industrial use - Measurement of the pH of a solution of urea of conventional concentration (100 g 1) - Potentiometric method《工业尿素 对常规浓度（100 g l）尿素溶液.pdf 1

NBN T 04-305-1983 6250 Urea for industrial use - Measurement of the pH of a solution of urea of conventional concentration (100 g 1) - Potentiometric method《工业尿素 对常规浓度（100 g l）尿素溶液.pdfNBN T 04-305-1983 6250 Urea for industrial use - Measurement of the pH of a solution of urea of conventional concentration (100 g 1) - Potentiometric method《工业尿素 对常规浓度（100 g l）尿素溶液.pdf

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NBN T 04-304-1983 1875 Urea for indus trial use - Determination of iron content-2 2--Bipyridyl photometric method《工业尿素 含铁量的测定 2 2-（双氮苯基光度测定方法）》.pdf 1

NBN T 04-304-1983 1875 Urea for indus trial use - Determination of iron content-2 2--Bipyridyl photometric method《工业尿素 含铁量的测定 2 2-（双氮苯基光度测定方法）》.pdfNBN T 04-304-1983 1875 Urea for indus trial use - Determination of iron content-2 2--Bipyridyl photometric method《工业尿素 含铁量的测定 2 2-（双氮苯基光度测定方法）》.pdf

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NBN T 04-303-1983 3125 Urea for industrial use - Determination of ash《工业尿素 炭酸钠的测定》.pdf 1

NBN T 04-303-1983 3125 Urea for industrial use - Determination of ash《工业尿素 炭酸钠的测定》.pdfNBN T 04-303-1983 3125 Urea for industrial use - Determination of ash《工业尿素 炭酸钠的测定》.pdf

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NBN T 03-271-1980 0625 Phosphoric acid for industrial use - Guide to sampling techniques《工业用磷酸 抽样技术指南》.pdf 7

NBN T 03-271-1980 0625 Phosphoric acid for industrial use - Guide to sampling techniques《工业用磷酸 抽样技术指南》.pdfNBN T 03-271-1980 0625 Phosphoric acid for industrial use - Guide to sampling techniques《工业用磷酸 抽样技术指南》.pdf

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NBN T 03-270-1980 5000 Phosphoric acid for industrial use (including foodstuffs)-Determi-nation of oxides of nitrogen content - 3 4-Xylenol spectrophotometric method《工业用磷酸(包括食品),氮的.pdf 8

NBN T 03-270-1980 5000 Phosphoric acid for industrial use (including foodstuffs)-Determi-nation of oxides of nitrogen content - 3 4-Xylenol spectrophotometric method《工业用磷酸(包括食品),氮的.pdfNBN T 03-270-1980 5000 Phosphoric acid for industrial use (including foodstuffs)-Determi-nation of oxides of nitrogen content - 3 4-Xylenol spectrophotometric method《工业用磷酸(包括食品),氮的.pdf

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NBN T 03-269-1980 7500 Phosphoric acid for industrial use (including foodstuffs) - Determi-nation of chloride content - Potentiometric method《工业用磷酸（包括食品） 氯含量的测定 电势法》.pdf 8

NBN T 03-269-1980 7500 Phosphoric acid for industrial use (including foodstuffs) - Determi-nation of chloride content - Potentiometric method《工业用磷酸（包括食品） 氯含量的测定 电势法》.pdfNBN T 03-269-1980 7500 Phosphoric acid for industrial use (including foodstuffs) - Determi-nation of chloride content - Potentiometric method《工业用磷酸（包括食品） 氯含量的测定 电势法》.pdf

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