spetsiaalse konstruktsiooniga puur suure sügavuse ja läbimõõdu suhtega avade puurimiseks tulirelvadesse (vt sügavpuurimine, relvapuurimine)
a special drill, usually with one or more flutes and with coolant passages through the drill body, used for deep-hole drilling of guns (see: deep-hole drilling, gun drilling)
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