self drilling bolt 自钻式锚杆
self-drilling bolt 自进式中空锚杆
self - drilling bolt 自钻式锚杆
self-drilling anchor bolt 自钻式锚杆
bolt hole drilling 锚杆钻孔
Winch base plate ready for cleaning and drilling bolt holes.
绞车底板准备清洁和钻井螺栓孔。
Then press the flattened, and then lathe processing waterline, chamfering process, finally with indexing disc with a drilling machine processing of bolt hole drilling.
再用压力机将其压平，再用车床进行加工水线、倒角等工艺，最后是用分度盘配合钻孔机进行螺栓孔的打孔的加工。
Single pass drilling apparatus, use a one-piece drill bit, method and rock bolt for single pass rock bolting.
单通道钻孔装置，整个钻头的使用，用于单通道岩石锚固的方法和岩石锚栓。
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