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XY-4型号岩心钻机Those who advise us in private, point out that we are wrong, are true friends那些私下忠告我们,指出我们错误的人,才是真正的朋友询 价 热 线 欢 迎 咨 询 :159 6537 1927 型号 XY-4 XY-4H XY-1000 XU-1000 钻进能力(m) ......