development and application of track shoe tensioner of toothed roller-bit drill 牙輪鉆機(jī)履帶板調(diào)緊器的研制與應(yīng)用
application of hall sensor in speed-regulation system of rotary three-cone bit drill 霍爾傳感器在牙輪鉆機(jī)調(diào)速系統(tǒng)中的應(yīng)用
8 it can be used with various drilling method such as carbide bit drilling, anger drilling, dth hammer drilling, follow-up casing drilling etc . 3 8鉆機(jī)可適用多種鉆進(jìn)工藝方法,如合金回轉(zhuǎn)鉆進(jìn)螺旋鉆進(jìn)潛孔錘鉆進(jìn)跟管鉆進(jìn)等。
8 it can be used with various drilling methods such as carbide bit drilling, anger drilling, dth hammer drilling and follow-up casing drilling etc . 3 8鉆機(jī)可適用多種鉆進(jìn)工藝方法,如合金回轉(zhuǎn)鉆進(jìn)螺旋鉆進(jìn)潛孔錘鉆進(jìn)跟管鉆進(jìn)等。
8 the rig is suitable for various drilling methods such as carbide bit drilling, auger drilling, dth hammer drilling, follow-up casing drilling, etc . 3 8鉆機(jī)可適用多種鉆進(jìn)工藝方法,如合金回轉(zhuǎn)鉆進(jìn)螺旋鉆進(jìn)潛孔錘鉆進(jìn)跟管鉆進(jìn)等。