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C0123900_374 Method of Test for Fundamental Transverse Longitudinal and Torsional Frequencies of Concrete Specimens《混凝土试体横向、纵向及扭曲之基本频率试验法》.pdf 4

C0123900_374 Method of Test for Fundamental Transverse Longitudinal and Torsional Frequencies of Concrete Specimens《混凝土试体横向、纵向及扭曲之基本频率试验法》.pdfC0123900_374 Method of Test for Fundamental Transverse Longitudinal and Torsional Frequencies of Concrete Specimens《混凝土试体横向、纵向及扭曲之基本频率试验法》.pdf

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C0123800_346 Method of test for obtaining and testing drilled cored and sawed beams of concrete《混凝土钻心试体及锯切长条试体取样法》.pdf 6

C0123800_346 Method of test for obtaining and testing drilled cored and sawed beams of concrete《混凝土钻心试体及锯切长条试体取样法》.pdfC0123800_346 Method of test for obtaining and testing drilled cored and sawed beams of concrete《混凝土钻心试体及锯切长条试体取样法》.pdf

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C0123700_374 Method of test for mixing water of concrete《混凝土拌和用水试验法》.pdf 4

C0123700_374 Method of test for mixing water of concrete《混凝土拌和用水试验法》.pdfC0123700_374 Method of test for mixing water of concrete《混凝土拌和用水试验法》.pdf

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C0084200_374 Ductile Cast Iron Special Castings for Pressure Main Lines Double-Socket Bends(DSB-11)《压力管路用延性铸铁管件–１１1 4°双承口弯管（ＤＳＢ–１１）》.pdf 2

C0084200_374 Ductile Cast Iron Special Castings for Pressure Main Lines Double-Socket Bends(DSB-11)《压力管路用延性铸铁管件–１１1 4°双承口弯管（ＤＳＢ–１１）》.pdfC0084200_374 Ductile Cast Iron Special Castings for Pressure Main Lines Double-Socket Bends(DSB-11)《压力管路用延性铸铁管件–１１1 4°双承口弯管（ＤＳＢ–１１）》.pdf

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C0084100_317 Ductile Cast Iron Special Castings for Pressure Main Lines Double-Socket Bends 22(DSB-22)《压力管路用延性铸铁管件–２２1 2°双承口弯管（ＤＳＢ–２２）》.pdf 2

C0084100_317 Ductile Cast Iron Special Castings for Pressure Main Lines Double-Socket Bends 22(DSB-22)《压力管路用延性铸铁管件–２２1 2°双承口弯管（ＤＳＢ–２２）》.pdfC0084100_317 Ductile Cast Iron Special Castings for Pressure Main Lines Double-Socket Bends 22(DSB-22)《压力管路用延性铸铁管件–２２1 2°双承口弯管（ＤＳＢ–２２）》.pdf

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C0084000_374 Ductile Cast Iron Special Castings for Pressure Main Lines Double-Socket Bends 45(DSB-45)《压力管路用延性铸铁管件–４５°双承口弯管（ＤＳＢ–４５）》.pdf 2

C0084000_374 Ductile Cast Iron Special Castings for Pressure Main Lines Double-Socket Bends 45(DSB-45)《压力管路用延性铸铁管件–４５°双承口弯管（ＤＳＢ–４５）》.pdfC0084000_374 Ductile Cast Iron Special Castings for Pressure Main Lines Double-Socket Bends 45(DSB-45)《压力管路用延性铸铁管件–４５°双承口弯管（ＤＳＢ–４５）》.pdf

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C0083900_752 Ductile Cast Iron Special Castings for Pressure Main Lines Double-socket Bends 90《压力管路用延性铸铁管件–９０°双承口弯管》.pdf 1

C0083900_752 Ductile Cast Iron Special Castings for Pressure Main Lines Double-socket Bends 90《压力管路用延性铸铁管件–９０°双承口弯管》.pdfC0083900_752 Ductile Cast Iron Special Castings for Pressure Main Lines Double-socket Bends 90《压力管路用延性铸铁管件–９０°双承口弯管》.pdf

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C0083800_838 Ductile Cast Iron Special Castings for Pressure Main Lines Collars《压力管路用延性铸铁管件–双承口套管》.pdf 2

C0083800_838 Ductile Cast Iron Special Castings for Pressure Main Lines Collars《压力管路用延性铸铁管件–双承口套管》.pdfC0083800_838 Ductile Cast Iron Special Castings for Pressure Main Lines Collars《压力管路用延性铸铁管件–双承口套管》.pdf

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C0040100_895 Drawing Symbols of Electrical Engineering《电机工程制图符号（制定及分类）》.pdf 1

C0040100_895 Drawing Symbols of Electrical Engineering《电机工程制图符号（制定及分类）》.pdfC0040100_895 Drawing Symbols of Electrical Engineering《电机工程制图符号（制定及分类）》.pdf

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C0040000_923 Letter Symbols of Electricity《电量文字符号》.pdf 9

C0040000_923 Letter Symbols of Electricity《电量文字符号》.pdfC0040000_923 Letter Symbols of Electricity《电量文字符号》.pdf

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