NF EN-14730-2-2006
本帖最后由 ygs67 于 2016-7-4 11:50 编辑NF EN-14730-2-2006
Railway applications - Track - Aluminothermic welding of rails - Qualifications of aluminothermic welders, approval of contractors and acceptance of welds
道路设施.铁轨.铁轨的热铝焊接.第2部分:热铝焊接工资格、合同验收和确认焊接 谢谢您的分享,金币已奖励! 好资料,期待下一份的到来
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