... means of teaching教学手段 mechanical drill机械操练 mechanical exercise机械练习 ...
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thermo-mechanical drill bit 热机钻头
mechanical ice core drill 冰岩芯机械钻机
worm-type mechanical hand-feed drill 蜗杆式机械手动推进钻机
He made the extraordinarily daring decision to incorporate in this sculpture a real mechanical drill, mounted on a tripod.
WSJ: Masterpiece: Jacob Epstein's Prophesy
The Plan B would drill at an 85 degree angle into an area of mine shaft that is used as a mechanical workshop.
CNN: New drill arrives in Chile with great fanfare
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