我公司主营           金刚石复合片钻头；（28.30.32.36.42.55.65.75.94.113.133.153）        合金钻头：（30.32.34.36.38.40.42.45.48.51.76.89.）        钻杆   (B19.B22.42.50.63.73)        截齿，齿套，齿座    （U82.U84.U92.U94.U95.120.170.S100)      宏利钻具       采矿先锋      厂价直销       质量三包