50mm ea ho itšeha ka botebo ba TCT e nang le sekoti se nang le sekoti sa weldon
Likaroloana
Botebo ba limilimithara tse 50 tsa TCT e sehiloeng (tungsten carbide drill) e nang le sekoti se nang le shank e ka lehlakoreng e na le likarolo tse 'maloa tse etsang hore e tšoanelehe bakeng sa lisebelisoa tsa ho cheka.Lintlha tse ling tsa bohlokoa li kenyelletsa:
1. Tungsten carbide drill bit (TCT)
2. Moqapi o se nang letho
3. 50mm ho seha botebo
4. Shank e tsitsitseng ka mahlakoreng
5. E loketse li-drill tsa makenete
![mefuta ea li-annular cutter](http://www.cndrills.com/uploads/annular-cutter-types.jpg)
TŠEBELETSO EA TŠEBELETSO
![setšoantšo sa ts'ebetso ea sehahi sa annular](http://www.cndrills.com/uploads/operation-diagram-of-annular-cutter.jpg)
Ngola molaetsa wa hao mona mme o re romele wona