adamantine boring是什么意思

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1)adamantine boring,冷铸钢粒钻进2)adamantine,冷铸钢粒3)steel grain drilling,钢粒钻进4)chilled shot dril,冷钢钻粒钻机5)shot drilling,钻粒钻进6)Chilled Cast Steel,冷硬铸钢