ICS25.140.30J47中华人民共和国国家标催GB/T4389一2013代替GB/T4389一1995双头呆扳手、双头梅花扳手、两用扳手头部外形的最大尺寸Double-headed open-ended wrenches,double-headed box wrenches andcombination wrenches-Maximum widths of heads(ISO 3318:2009,Assmbly tools for screws and nuts-Double-headed open-ended wrenches,double-headed box wrenches and combination wrenches-Maximum widths of heads,MOD)2013-11-12发布2014-05-01实施中华人民共和国国家质量监督检验检疫总局中国国家标准化管理委员会发布
