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弹簧钻头是用来捞取岩矿心的一种钻具。适用于采取脆碎岩矿心。特别是在砾石层中钻进,岩心难取时,用它效果良好。
Spring drill bit is used to fish rock core drill. Suitable for taking crushed rock ore. Especially in the gravel layer drilling, core hard to use, it works well.