50mm kudula mozama TCT pobowola pachimake pobowola ndi weldon shank

Kubowola kwa 50 mm kwa TCT (tungsten carbide drill) yokhala ndi shank yokhala m'mbali imakhala ndi zinthu zingapo zomwe zimapangitsa kuti ikhale yoyenera kubowola. Zina mwazinthu zazikulu ndi izi:

1. Tungsten carbide drill bit (TCT)

2. Mapangidwe opanda pake

3. 50mm kudula kuya

4. Shank yokhazikika pambali

5. Oyenera maginito kubowola