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gneiss
This mountain is mainly composed of gneiss.
(petrology) gabbro
This area is rich in gabbro.
(petrology) diorite
This mountain is made of diorite.
jackhammer (portable percussive drill device) / any other type of rock drill
He was repairing the road using a jackhammer.
Alternative form of 削岩機
This rock drill is very efficient and can quickly cut through rock.
(petrology) breccia
This area is rich in breccia.
where there is a will there is a way
He said, 'Where there is a will, there is a way,' and faced the difficult situation.
(petrology) granodiorite
This mountain is mainly composed of granodiorite.
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