關於「070M20 equivalent」標籤，搜尋引擎有相關的訊息討論：

[PDF] DNVGL-OS-B101 Metallic materials - Rules and standardsOn 12 September 2013, DNV and GL merged to form DNV GL Group. ... Ultrasonic Testing of Steel Flat Product of Thickness Equal or Greater than 6 mm ( ...缺少字詞： 070M20 twGrade 300 Cast Iron - EN-GLJ-300 - Steel ExpressEN