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C0171600_488 Ethyl Cyanoacetate《化学试药（氰基乙酸乙烷）》.pdf 1

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C0171500_431 Ethyl Bromide《化学试药（溴乙烷）》.pdf 1

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C0119700_402 Round File for Smith《铁工用圆锉》.pdf 1

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C0119300_374 Half-round File for Tinman《铜工用扁圆锉》.pdf 1

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C0078600_402 Method of Test for Time of Setting of Hydraulic Cement (by Vicat Needle)《水硬性水泥凝结时间检验法（费开氏针法）》.pdf 2

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C0078500_781 Method of Test for Time of Setting of Hydraulic Cement (by Gilmore Needle)《水硬性水泥凝结时间检验法（吉尔摩氏针法）》.pdf 2

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