一種礦產勘察用鑽頭
展示「一種礦產勘察用鑽頭」發明專利，說明其用於勘探的耐磨鑽頭結構、硬岩破岩技術與取芯難題對應資訊，可核對專利名稱與技術證明，查看專利證明
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一種礦產勘察用鑽頭
Lei Peng
Lei Peng
General Manager
Language中文繁體
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