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GB-T1804-2000一般公差未注公差线形和角度尺寸的公差.pdf

GB 18613-2012中小型三相异步电动机能效限定值及能效等级.pdf

GB 150-2011《压力容器》标准释义.PDF

GB-T1220-2007 不锈钢棒_NoRestriction.pdf

GB-T19804-2005焊接结构的一般尺寸公差和形位公差.pdf

AWS A5.16 A5.16M-2007 钛及钛合金焊接电极和焊条规范.pdf

AWS A5.16-90 Specification for Titanium and Titanium Alloy Welding Electrodes and Rods R(1997).pdf

GB-T 12459-2005钢制对焊无缝管件.pdf

AWS A5.15-90 Specification for Welding Electrodes and Rods for Cast Iron.pdf

AWS A5.14-97 Specification for Nickel and Nickel-Alloy Bare Welding Electrodes and Rods.pdf

AWS A5.11-97 Specification for Nickel and Nickel-Alloy Welding Electrodes for Shielded Metal Arc Welding.pdf

AWS A5.10-99 Specification for Bare Aluminum and Aluminum -Alloy Welding Electrodes and Rods.pdf