انگلیسی 1385
P.T. Drill for Children
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اشتراکگذاری
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اشتراکگذاری
Wishlist
شابک:
9788178792682
ناشر:
Sports Publication
صفحات:
200
وزن:
329 g
ابعاد:
9٫1 x 11٫5 x 0٫3 cm
جلد کتاب:
شومیز
Thema:
- Sports and Active outdoor recreation
- Educational: Physical education
A drill (known in many countries as a drill machine) is a tool fitted with a cutting tool attachment or driving tool attachment, usually a drill bit or driver bit, used for boring holes in various materials or fastening various materials together. The attachment is gripped by a chuck at one end of the drill and rotated while pressed against the target material. The tip, and sometimes edges, of the cutting tool does the work of cutting into the target material. This may be slicing off thin shavings (twist drills or auger bits), grinding off small particles (oil drilling), crushing and removing pieces of the workpiece (SDS masonry drill), countersinking, counterboring, or other operations.
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