Terms containing shell bit

Subject	English	Chinese
tech.	bit reaming shell	扩孔器 (细粒金刚石)
tech.	shell bit	筒形钻
tech.	shell bit	木工打孔钻头
eng.geol.	shell bit	筒式〔勺式〕钻头
tech.	shell bit	筒式钻头
tech.	shell bit	壳形钻
eng.geol.	twisted shell bit	螺壳形木钻头
tech.	twisted shell bit	螺壳木钻头