1) three-flute core drill
三槽空心钻
2) four-flute core drill
[机]四槽空心钻
3) three-fluted drill; threegroove drill
三槽钻头
4) three-groove core drill
三槽扩孔钻
5) cavity aqueduct
空心渡槽
1.
Anewtype of aqueduct structure form,cavity aqueduct,is proposedin order to reduce hydraulic aqueduct structural dam-age fromthermal stress in this paper.
为了有效地降低温度应力对水工渡槽的结构破坏,提出了空心渡槽这一新型的渡槽结构形式。
6) Hollow drill
空心钻
补充资料：冻土钻(见取土钻)
冻土钻(见取土钻)
dongtuzuan冻土钻见取土钻
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条